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Round|Lab Grown|IGI

12.57ct G VS2 Round Lab Grown Diamond

ID • G/VS2 • IGI LG612321275

Shape and cutting style on the report: Round brilliant

Certificate IGI LG612321275

Diamond specifications and retailer prices

From $4,845 USD
As of October 31, 2026
Save $15,575 USD (76%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $20,420 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 12.57ct lab-grown round diamond

This 12.57ct lab-grown round sits in the over five carat band, graded G colour (near-colourless) and VS2 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG612321275 or 612321275. Listed at 7 retailers as of October 31, 2026, with prices from $4,845 to $20,420, a $15,575 spread on the same certified stone. Brilliant Earth lists it at $20,420. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

12.57
Carat
G
Color
VS2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG612321275
Dimensions14.82 × 14.73 × 9.22 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
14.82 mm14.73 mm12.57 ctG / VS2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG612321275
Side View
Table 56.0%Crown 35.5°Girdle: MediumPavilion 40.6°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $20,420 USD|Low: $4,845 USD|High: $21,050 USD|Avg: $9,126 USD|-3.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 6$4,845 USD
Retailer 3$5,007 USD
Retailer 4$5,290 USD
Retailer 10$5,341 USD
Retailer 9$5,518 USD
Retailer 2$5,853 USD
Retailer 5$6,340 USD
Retailer 7$9,296 USD
Retailer 8$9,624 USD
Retailer 11$13,689 USD
Retailer 12$17,532 USD
Brilliant Earth$20,420 USD

18 data points across 12 retailers

7 retailers$4,845 USD to $20,420 USD

A
Cheapest Retailer
-
$4,845 USD
A
Retailer 2
-
$5,518 USD
View
A
Retailer 3
-
$5,853 USD
€5,574 EUR
View
Retailer 4
-
$6,340 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
$9,296 USD
View
B+
Retailer 6
-
$9,624 USD
View
Most Expensive
B
Brilliant Earth
10155003A · Oct 31
$20,420 USD
View
6 more retailers have this diamond
Prices start from $4,845 USDSave up to $15,575 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
12.57ct Round
$4,845 USD