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4 Carat Unheated Blue Sapphire

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2 1/4 Carat Cushion Blue Sapphire GIA Unheated
Located in San Francisco, CA
This Cushion shape 2.23-carat Natural Blue color sapphire GIA certified has been hand-selected by
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Blue Sapphire

1 1/4 Carat Oval Light Grayish Blue Sapphire GIA Unheated
Located in San Francisco, CA
This Oval shape 1.24-carat Natural Light Grayish Blue color sapphire GIA certified has been hand
Category

21st Century and Contemporary American Loose Gemstones

Materials

Blue Sapphire

2 3/4 Carat Oval Light Grayish Blue Sapphire GIA Unheated
Located in San Francisco, CA
This Oval shape 2.73-carat Natural Light Grayish Blue color sapphire GIA certified has been hand
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Blue Sapphire

Certified Unheated 4 cts Sapphire, Blue Sapphire, Diamond Ring in 18K Rose Gold
Located in Bangkok, TH
Certified Unheated "Very Light Violet" Sapphire 4.78 carats center, Blue Sapphire 1.82 carats with
Category

2010s Thai Contemporary Solitaire Rings

Materials

Blue Sapphire, Sapphire, Diamond, 18k Gold, Rose Gold

1.10 Carat Cushion Teal Sapphire GIA Certified Unheated
Located in San Francisco, CA
This 1.10-carat Cushion Teal Blue GIA Certified Natural Sapphire was selected by our experts for
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Green Sapphire

1.14ct Oval Teal Blue Sapphire from Australia Unheated
Located in Toronto, Ontario
: Greenish Blue Tone: 6-7 Medium Dark - Dark Saturation: 4/6 Moderately Strong Species: Corundum Variety
Category

2010s Australian Loose Gemstones

Materials

Blue Sapphire, Sapphire

1.14ct Oval Teal Blue Sapphire from Australia Unheated
1.14ct Oval Teal Blue Sapphire from Australia Unheated
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W 0.28 in D 0.14 in L 0.21 in
Unheated Platinum Sapphire Ring, 5.08 Carat Sapphire GIA Certified
Located in Tampa, FL
8.71 x 6.87 mm weighing 5.08 carat. Type II. Medium, moderately strong, blue color GIA B 5/4, set with
Category

2010s Unknown Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

1.16ct Oval Teal Blue Sapphire from Australia Unheated
Located in Toronto, Ontario
Blue Tone: 6-7 Medium Dark - Dark Saturation: 4/6 Moderately Strong Species: Corundum Variety: Sapphire
Category

2010s Australian Loose Gemstones

Materials

Blue Sapphire

1.16ct Oval Teal Blue Sapphire from Australia Unheated
1.16ct Oval Teal Blue Sapphire from Australia Unheated
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W 0.29 in D 0.13 in L 0.21 in
1.27ct Oval Teal Blue Sapphire from Australia Unheated
Located in Toronto, Ontario
: Greenish Blue Tone: 6-7 Medium Dark - Dark Saturation: 4/6 Moderately Strong Species: Corundum Variety
Category

2010s Australian Loose Gemstones

Materials

Blue Sapphire

1.27ct Oval Teal Blue Sapphire from Australia Unheated
1.27ct Oval Teal Blue Sapphire from Australia Unheated
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W 0.28 in D 0.16 in L 0.21 in
3.68ct Pair Pear Blue Sapphire from Thailand Unheated
Located in Toronto, Ontario
purplish Blue Hue: slightly purplish Blue Tone: 8 Very Dark Saturation: 4 Moderately Strong Species
Category

2010s Thai Loose Gemstones

Materials

Blue Sapphire

3.68ct Pair Pear Blue Sapphire from Thailand Unheated
3.68ct Pair Pear Blue Sapphire from Thailand Unheated
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W 0.36 in D 0.16 in L 0.28 in
3.3ct Oval Teal Blue Sapphire from Australia Unheated
Located in Toronto, Ontario
: Greenish Blue Tone: 6-7 Medium Dark - Dark Saturation: 4/6 Moderately Strong Species: Corundum Variety
Category

2010s Australian Loose Gemstones

Materials

Blue Sapphire

3.3ct Oval Teal Blue Sapphire from Australia Unheated
3.3ct Oval Teal Blue Sapphire from Australia Unheated
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W 0.39 in D 0.22 in L 0.29 in
2.88ct Pair Pear Blue Sapphire from Thailand Unheated
Located in Toronto, Ontario
purplish Blue Hue: slightly purplish Blue Tone: 7 Dark Saturation: 4-5 Moderately Strong to Strong Species
Category

2010s Thai Loose Gemstones

Materials

Blue Sapphire

2.88ct Pair Pear Blue Sapphire from Thailand Unheated
2.88ct Pair Pear Blue Sapphire from Thailand Unheated
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W 0.34 in D 0.16 in L 0.24 in
2.53ct Pair Pear Blue Sapphire from Thailand Unheated
Located in Toronto, Ontario
magnification. Colour: slightly purplish Blue Hue: slightly purplish Blue Tone: 7 Dark Saturation: 4 Moderately
Category

2010s Thai Loose Gemstones

Materials

Blue Sapphire

2.53ct Pair Pear Blue Sapphire from Thailand Unheated
2.53ct Pair Pear Blue Sapphire from Thailand Unheated
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W 0.34 in D 0.12 in L 0.24 in
18.33 Carat Ceylon Unheated Sapphire Ring
By Mehnaz Durrani
Located in Richmond, BC
Glamorous unheated sapphire diamond cocktail ring. Lively "cornflower blue", Ceylon origin, high
Category

21st Century and Contemporary Canadian Contemporary Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold

1.33 ct Unheated Blue Ceylon Star Sapphire
Located in Toronto, Ontario
! It is such a treat to get fine unheated Ceylonese Star Sapphire like this. It is easy and common to
Category

2010s Sri Lankan Loose Gemstones

Materials

Star Sapphire

1.33 ct Unheated Blue Ceylon Star Sapphire
1.33 ct Unheated Blue Ceylon Star Sapphire
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W 0.26 in D 0.13 in L 0.23 in
Rare 2.92 Carat Radiant-Shaped Teal Natural Sapphire GIA Unheated
Located in San Francisco, CA
A rare 2.92-carat Radiant Natural Greenish Blue Unheated Sapphire GIA Certificate 1206137505 was
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Green Sapphire

AIG Certified 1.80 Carat, Unheated Royal Blue Sapphire & Diamond Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring a AIGS Certified 1.80 Carat Natural Unheated, Royal Blue Blue Sapphire
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

3.22ct Pair Heart Cabochon Blue Sapphire from Thailand Unheated
Located in Toronto, Ontario
: 4 Moderately Strong Species: Corundum Variety: Sapphire Treatment: None Origin: Thailand Notes
Category

2010s Thai Loose Gemstones

Materials

Blue Sapphire

3.22ct Pair Heart Cabochon Blue Sapphire from Thailand Unheated
3.22ct Pair Heart Cabochon Blue Sapphire from Thailand Unheated
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W 0.24 in D 0.16 in L 0.24 in
2.7ct Oval Vivid Blue Sapphire GIA Certified Sri Lanka Unheated
Located in Toronto, Ontario
Included: Some inclusions visible to the naked/unaided eye. Colour: Blue Hue: Blue Tone: 4 Medium
Category

2010s Sri Lankan Loose Gemstones

Materials

Sapphire, Blue Sapphire

2.7ct Oval Vivid Blue Sapphire GIA Certified Sri Lanka Unheated
2.7ct Oval Vivid Blue Sapphire GIA Certified Sri Lanka Unheated
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W 0.29 in D 0.22 in L 0.33 in
Certified Unheated 4 Cts Blue Sapphire with Diamond Ring in 18K Rose Gold
Located in Bangkok, TH
Certified Unheated Cornflower Blue Sapphire 4.11 carats with Diamond 1.37 carats Ring set in 18
Category

2010s Thai Contemporary Solitaire Rings

Materials

Diamond, Blue Sapphire, 18k Gold, Rose Gold

1.62 Carat Emerald Shape Light Violet Sapphire GIA Certified Unheated
Located in San Francisco, CA
This Emerald shape 1.62-carat Natural Unheated Very Light Violet color sapphire GIA certificate
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Sapphire, Blue Sapphire, Purple Sapphire

0.85ct Oval Icy Blue Sapphire from Sri Lanka Unheated
Located in Toronto, Ontario
: Blue Hue: Blue Tone: 3 Light Saturation: 3-4 Moderate- Moderately Strong Species: Corundum Variety
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

0.85ct Oval Icy Blue Sapphire from Sri Lanka Unheated
0.85ct Oval Icy Blue Sapphire from Sri Lanka Unheated
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W 0.28 in D 0.13 in L 0.19 in
0.73ct Oval Icy Blue Sapphire from Sri Lanka Unheated
Located in Toronto, Ontario
Blue Tone: 4 Medium Light Saturation: 3 Moderate Species: Corundum Variety: Sapphire Treatment: None
Category

2010s Sri Lankan Loose Gemstones

Materials

Blue Sapphire

0.73ct Oval Icy Blue Sapphire from Sri Lanka Unheated
0.73ct Oval Icy Blue Sapphire from Sri Lanka Unheated
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W 0.28 in D 0.09 in L 0.2 in
2.06 Carat Cushion Shaped Teal, Green Unheated Natural Sapphire GIA Certified
Located in San Francisco, CA
A 2.06-carat Natural Cushion Greenish Blue Unheated Sapphire GIA Certificate 5211043017 was hand
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire, Green Sapphire

Unheated Platinum Sapphire Ring, 5.59 Carat Ceylon Sapphire GIA Origin Certified
Located in Tampa, FL
New platinum unheated sapphire ring containing an oval brilliant cut blue Ceylon transparent
Category

2010s Sri Lankan Engagement Rings

Materials

Sapphire, Blue Sapphire, Diamond, Platinum

3.01 Carat Cushion-Shape Teal Color Sapphire GIA Certified Unheated
Located in San Francisco, CA
A 3.01-carat Natural Cushion Greenish Blue Unheated Sapphire GIA Certificate 6203625761 was hand
Category

21st Century and Contemporary Loose Gemstones

Materials

Sapphire

2.07 Carat Round Shaped Teal Green Color Unheated Natural Sapphire GIA Cert
Located in San Francisco, CA
A Rare 2.07-carat Round Natural Cushion Greenish Blue Unheated Sapphire GIA Certificate 5211043018
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Sapphire, Blue Sapphire, Green Sapphire

1 1/3 Carat Emerald Shape Teal Sapphire GIA Unheated
Located in San Francisco, CA
This Emerald shape 1.35-carat Natural Unheated Teal color sapphire GIA certified has been hand
Category

21st Century and Contemporary Sri Lankan Loose Gemstones

Materials

Sapphire, Green Sapphire

Unheated Platinum Sapphire Ring, 7.06 Carat Cushion Cut GIA Certified
Located in Tampa, FL
New platinum untreated sapphire ring containing a cushion cut natural blue Ceylon sapphire
Category

2010s Sri Lankan Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Classic Unheated GIA Sapphire Diamond Ring in Platinum, 5.40 Carat
By Gold Adore
Located in San Francisco, CA
This Classic Unheated GIA Sapphire Diamond Ring Engagement Ring Wedding Ring in Platinum is just so
Category

2010s American Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

24 Carats Natural Blue Sapphire and 4 Carats Diamond Drop 18K Gold Earrings
By Iris Fine Jewelry
Located in New York, NY
set in 18K gold. Natural Blue Sapphire- 24 Carats Diamond- 4 Carats 18 K Gold 28.85 Grams
Category

21st Century and Contemporary American Drop Earrings

Materials

Diamond, White Diamond, Blue Sapphire, Gold

1.88 Carat Blue Sapphire Platinum Ring
By Iris Fine Jewelry
Located in New York, NY
timeless elegance. This stunning piece features a 1.88-carat unheated Ceylon sapphire, certified by the GIA
Category

21st Century and Contemporary Modern Engagement Rings

Materials

Blue Sapphire, Platinum

AGL Certified 8.463 ct. Unheated & Untreated Blue Sapphire & Fine Diamond Ring
By Pierre Famille
Located in Aspen, CO
Set in platinum and flanked by 4 long baguette cut diamonds, measuring 7.3 mm. These diamonds
Category

21st Century and Contemporary Contemporary Cocktail Rings

Materials

Diamond, White Diamond, Blue Sapphire, Platinum

GIA Certified 1.25 Carat, Unheated, Ceylon Sapphire & Diamond Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring 1.25 Carat Natural, Unheated, Burmese Blue Sapphire and 0.55 Carats
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA 18K Blue Sapphire Diamond Ring 12.04 TCW Unheated Ceylon Gold
Located in Sylvania, GA
UNHEATED SAPPHIRE DIAMOND ANTIQUE RING & BOX! HUGE 9.52 CARAT BRILLIANT ROYAL BLUE GIA CERTIFIED RARE NO
Category

Antique 19th Century Cocktail Rings

Materials

Diamond, Blue Sapphire, Gold, 18k Gold

1.04ct IGI Certified Unheated Green Blue Sapphire 18k White Gold Diamond Pendant
By Gems and Jewels UK
Located in Birmingham, GB
IGI Certified Untreated Green-Blue Teal Sapphire & Diamond 18k White Gold Pendant. 1.04 Carat
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, Blue Sapphire, Green Sapphire, Gold, 18k Gold, White ...

GIA Certified 3.33 Carat Natural Burmese, Unheated Sapphire Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 3.33 Carat Natural Burmese, Unheated Sapphire and 0.37
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Unheated Blue Sapphire Ring GIA Certified, 5.04 ct 18kt White Gold
Located in Tampa, FL
New 18kt white gold sapphire ring, set with unheated round cut natural blue Ceylon sapphire
Category

2010s Sri Lankan Modern Engagement Rings

Materials

Blue Sapphire, Diamond, 18k Gold, White Gold

2.27 Carat Natural Unheated, Ceylon Sapphire and Diamond Ring set in Platinum
Located in Tokyo, JP
A beautiful ring featuring 2.273 Carat Natural Blue Sapphire and 0.70 Carats Diamond Accents set in
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 4 Carat Oval Blue No Heat Ceylon Sapphire Diamond Ring
By Antinori Fine Jewels
Located in Rome, IT
GIA certified oval cut blue sapphire is completely unheated and displays striking, vibrant blue
Category

2010s Italian Modern Solitaire Rings

Materials

Sapphire, White Diamond, Diamond, Platinum

GIA Platinum Blue Sapphire Unheated Diamond Ring Vintage Natural Fine 9.38 Cts
Located in Sylvania, GA
SAPPHIRE DIAMOND VINTAGE RING & BOX! 6.55 CARAT FINE BLUE GIA CERTIFIED RARE NO HEAT NATURAL SAPPHIRE
Category

20th Century Cocktail Rings

Materials

Diamond, Blue Sapphire, Platinum

GIA Certified 2.07 Carat, Unheated, Heart-Cut Sapphire & Diamond Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring 2.07 Carat Natural Blue Sapphire and 0.67 Carats Diamond Accents set in
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Unheated 3 Stone Sapphire Ring, 5.07 Carat Platinum 950 GIA Certified x 3
Located in Tampa, FL
sapphire measuring 9.54 x 7.58 x 7.25 mm weighing 5.07 carat. Type II. medium, moderately strong, blue
Category

2010s Unknown Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

2.76ct Rose Cut Oval Blue and Green Parti Sapphire from Australia Unheated
Located in Toronto, Ontario
/ Multicolor Blue and Green Hue: Blue and Green Tone: 6 Medium Dark Saturation: 4/6 Moderately Strong Species
Category

2010s Australian Loose Gemstones

Materials

Sapphire

GIA Certified Royal Blue Sapphire Ring GIA Certified and Stated Unheated Kashmir
Located in Jupiter, FL
Very important sapphire of 1.97 carats flanked by a baguette on either side made in platinum and
Category

21st Century and Contemporary Art Nouveau Engagement Rings

Materials

Diamond, Blue Sapphire

GIA Platinum 18K Blue Sapphire Diamond Pendant Unheated Ceylon Vintage 11.12 Cts
Located in Sylvania, GA
in Style! 1 GIA Certified (UNHEATED) Transparent Fancy Royal Blue Sapphire Approx- 7.24 Carats 18
Category

Antique 19th Century Victorian Pendant Necklaces

Materials

Diamond, Blue Sapphire, Gold, 18k Gold, Platinum

3 Stone Sapphire Platinum Ring, 3.50ct Unheated Ceylon Sapphire GIA Certified
Located in Tampa, FL
New Platinum custom natural Ceylon sapphire ring containing an untreated oval cut natural blue
Category

2010s Sri Lankan Three-Stone Rings

Materials

Blue Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 1.02 Carat, Unheated Padparadscha Sapphire Ring set in Platinum
Located in Tokyo, JP
A beautiful ring featuring GIA Certified 1.02 Carat Natural, UnheatedPadparadscha Sapphire and 0.97
Category

21st Century and Contemporary Japanese Modern Engagement Rings

Materials

Diamond, Sapphire, Padparadscha Sapphire , Platinum

Unheated Fancy Sapphire Ring 2.76 Carat Mismatched Oval Bypass "Toi et Moi" Ring
By Emeralds Maravellous
Located in US
*** Inseparable, unheated fancy oval blue and pink Sapphire mismatched pair, totaling 2.44 carats, are decorated
Category

21st Century and Contemporary American Modern Cocktail Rings

Materials

Sapphire, 14k Gold, 18k Gold, Palladium, Platinum

8.80 Carat Unheated / Untreated Yellow Sapphire Cocktail Ring Set in Platinum
Located in Tokyo, JP
A beautiful ring featuring 8.80 Carat Natural Untreated Yellow Sapphire and 1.01 Carats Diamond
Category

21st Century and Contemporary Japanese Modern Cocktail Rings

Materials

Yellow Sapphire, Platinum

Color Change Sapphire Ring, 4.06ct Unheated 3 Stone Platinum Ring GIA Cerftified
Located in Tampa, FL
New platinum 950 ring set with a cushion-cut violet-blue changing to purple Ceylon sapphire, 8.96 x
Category

2010s Sri Lankan Three-Stone Rings

Materials

Diamond, Sapphire, Blue Sapphire, Purple Sapphire, Platinum

GIA Blue Star Sapphire No Heat Sri Lanka Certified Natural Vintage 10.69 Carats
Located in Sylvania, GA
Certified (UNHEATED) Transparent Fancy Soft Blue Star Sapphire Approx- 10.69 Carats Official GIA
Category

20th Century Sri Lankan Loose Gemstones

Materials

Blue Sapphire, Star Sapphire, Platinum

Platinum Sapphire Ring, 3.53 Carat Untreated Ceylon Sapphire GIA Certified
Located in Tampa, FL
New platinum 950 ring set with an oval cut blue Ceylon sapphire, 9.19 x 7.66 x 5.58 mm with a carat
Category

2010s Sri Lankan Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

.20 Carat Sapphire Yellow Gold Engagement Ring
Located in Atlanta, GA
(Unheated) Shape: Antique Oval Carat Weight: .20 carat, total weight. Color: Blue Finger to Top of Stone
Category

Antique Early 1900s Unknown Edwardian Engagement Rings

Materials

White Diamond, Sapphire, Blue Sapphire, 18k Gold, Yellow Gold

GIA Certified #5231058390 No Heat Ceylon Cabochon Sapphire Weighing 17.16 carat
By OGI Ltd
Located in New York, NY
rarity. Weighing an impressive 17.16 carats, this sapphire is a testament to nature's remarkable artistry
Category

20th Century Sri Lankan Contemporary Loose Gemstones

Materials

Sapphire, Blue Sapphire

Sapphire Natural 17 Carats Ceylon Sapphire Ring on White Gold 18K with Diamonds
Located in Paris, FR
Ceylon unheated 17 carats sapphire ring in 18 carats white gold and 4 carats of diamonds 18-carat
Category

Early 2000s French Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold

Royal Blue Sapphire Diamond Gold Promise Ring
Located in Berlin, DE
18K white gold ring with natural unheated Royal Blue Sapphire and Diamond Sapphire origin
Category

2010s Japanese Art Deco Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, White Gold

Blue Pink Sapphire Engagement ring White Gold Promise ring
By Alexey Gabilo
Located in Berlin, DE
18k white gold engagement ring with unheated Blue and Pink Sapphires Sapphires origin - Sri Lanka
Category

2010s German Artisan Engagement Rings

Materials

Blue Sapphire, Pink Sapphire, 18k Gold, White Gold

Sapphire Ring 10.83 Carats Burmese Non Heated and Diamonds Ring
Located in Paris, FR
sapphire weighing 10.83 carats supported on both sides by 4 baguette diamonds. Or 8 baguette diamonds Twice
Category

Early 2000s French Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, 18k Gold, White Gold, Platinum

Sapphire Royal Blue Diana Queen Diamond Style Gold Engagement ring
Located in Berlin, DE
An amazing 18K gold ring with natural unheated Royal Blue sapphire and diamond in Princess Diana
Category

2010s Japanese Art Deco Engagement Rings

Materials

Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, White Gold

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4 Carat Unheated Blue Sapphire For Sale on 1stDibs

Surely you’ll find the exact 4 carat unheated blue sapphire you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Each design created in this style — which was crafted with great care and often made from Gold, 18k Gold and Platinum — can elevate any look. Our collection of these items for sale includes 31 vintage editions and 172 modern creations to choose from as well. Making the right choice when shopping for a 4 carat unheated blue sapphire may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. For this particular piece, 1.5 Carat and 2 Carat are consistently popular carat weights. Creating a 4 carat unheated blue sapphire has been a part of the legacy of many jewelers, but those produced by Merkaba, Sarosi By Timeless Gems and Emeralds Maravellous are consistently popular. Today, if you’re looking for an oval cut version of this piece and are unable to find the perfect match, our selection also includes cushion cut and round cut alternatives. Finding a 4 carat unheated blue sapphire for sale for women should be easy, but there are 100 pieces available to browse for unisex as well as men, too.

How Much is a 4 Carat Unheated Blue Sapphire?

The price for a 4 carat unheated blue sapphire starts at $1,134 and tops out at $835,000 with these rings, on average, selling for $20,800.