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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 €4,337 EUR
$4,845 USD
As of October 31, 2026
Save €13,941 EUR (76%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €18,278 EUR 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 €4,337 to €18,278, a €13,941 spread on the same certified stone. Brilliant Earth lists it at €18,278. 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: €18,278 EUR|Low: €4,337 EUR|High: €18,842 EUR|Avg: €8,169 EUR|-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€4,337 EUR
Retailer 3€4,482 EUR
Retailer 4€4,735 EUR
Retailer 10€4,781 EUR
Retailer 9€4,939 EUR
Retailer 2€5,239 EUR
Retailer 5€5,675 EUR
Retailer 7€8,321 EUR
Retailer 8€8,614 EUR
Retailer 11€12,253 EUR
Retailer 12€15,693 EUR
Brilliant Earth€18,278 EUR

18 data points across 12 retailers

7 retailers€4,337 EUR to €18,278 EUR

A
Cheapest Retailer
-
€4,337 EUR
$4,845 USD
A
Retailer 2
-
€4,939 EUR
$5,518 USD
View
A
Retailer 3
-
€5,239 EUR
View
Retailer 4
-
€5,675 EUR
$6,340 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
€8,321 EUR
$9,296 USD
View
B+
Retailer 6
-
€8,614 EUR
$9,624 USD
View
Most Expensive
B
Brilliant Earth
10155003A · Oct 31
€18,278 EUR
$20,420 USD
View
6 more retailers have this diamond
Prices start from €4,337 EURSave up to €13,941 EUR

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
€4,337 EUR