Radiant|Lab Grown|IGI

12.56ct G VS1 Radiant Lab Grown Diamond

ID • G/VS1 • IGI LG603334337

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG603334337

Diamond specifications and retailer prices

From $4,040 USD
As of October 30, 2026
Save $16,360 USD (80%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $20,400 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 12.56ct lab-grown radiant diamond

This 12.56ct lab-grown radiant sits in the over five carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG603334337 or 603334337. Listed at 20 retailers as of October 29, 2026, with prices from $4,040 to $20,400, a $16,360 spread on the same certified stone. Brilliant Earth lists it at $20,400. 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

12.56
Carat
G
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle45.3°
Pavilion angle37.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG603334337
Dimensions14.83 × 12.00 × 8.25 mm
L/W Ratio1.24
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
14.83 mm12.00 mm12.56 ctG / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG603334337
Side View
Table 69.0%Crown 45.3°Girdle: MediumPavilion 37.8°Culet: NoneDepth 68.8%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $20,400 USD|Low: $3,878 USD|High: $20,400 USD|Avg: $7,567 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 31, 2026
Retailer 10$4,040 USD
Retailer 3$4,523 USD
Retailer 11$4,686 USD
Retailer 7$4,690 USD
Retailer 13$4,787 USD
Retailer 2$6,156 USD
Retailer 8$6,215 USD
Retailer 4$6,568 USD
Retailer 6$7,253 USD
Retailer 9$7,257 USD
Retailer 12$11,848 USD
Retailer 5$11,882 USD
Brilliant Earth$20,400 USD

43 data points across 13 retailers

20 retailers$4,040 USD to $20,400 USD

A
Cheapest Retailer
-
$4,040 USD
A
Retailer 2
-
$4,234 USD
View
A
Retailer 3
-
$4,523 USD
View
Final sale: no returns
B+
Retailer 4
-
$4,686 USD
View
Retailer 5
-
$4,686 USD
View
Price last confirmed 18 days ago
B+
Retailer 6
-
$4,690 USD
View
B+
Retailer 7
-
$4,787 USD
View
B+
Retailer 8
-
$5,530 USD
HK$43,200 HKD
View
B+
Retailer 9
-
$5,856 USD
View
B+
Retailer 10
-
$6,156 USD
£4,847 GBP
View
B+
Retailer 11
-
$6,215 USD
View
B+
Retailer 12
-
$6,568 USD
£5,172 GBP
View
B+
Retailer 13
-
$7,253 USD
ZAR 117,171 ZAR
View
B+
Retailer 14
-
$7,257 USD
View
B
Retailer 15
-
$9,813 USD
View
B
Retailer 16
-
$11,848 USD
View
Retailer 17
-
$11,882 USD
View
Price last confirmed 18 days ago
B
Retailer 18
-
$13,015 USD
View
B
Retailer 19
-
$16,636 USD
View
Most Expensive
B
Brilliant Earth
10597375A · Oct 29
$20,400 USD
View
19 more retailers have this diamond
Prices start from $4,040 USDSave up to $16,360 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
12.56ct Radiant
$4,040 USD