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Cushion|Lab Grown|IGI

15.65ct H VS1 Cushion Lab Grown Diamond

ID • H/VS1 • IGI LG627413256

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG627413256

Diamond specifications and retailer prices

From $3,934 USD
£3,097 GBP
As of October 30, 2026
Save $14,056 USD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $17,990 USD at Brilliant Earth · As of October 29, 2026
View at Brilliant Earth

About this 15.65ct lab-grown cushion diamond

This 15.65ct lab-grown cushion sits in the over five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG627413256 or 627413256. Listed at 14 retailers as of October 29, 2026, with prices from $3,934 to $17,990, a $14,056 spread on the same certified stone. Brilliant Earth lists it at $17,990. 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

15.65
Carat
H
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.7°
Pavilion angle31.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG627413256
Dimensions14.80 × 14.01 × 8.74 mm
L/W Ratio1.06
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
14.80 mm14.01 mm15.65 ctH / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG627413256
Side View
Table 62.0%Crown 39.7°Girdle: MED-THKPavilion 31.2°Culet: NoneDepth 62.4%

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 30
Current: $17,990 USD|Low: $3,920 USD|High: $19,230 USD|Avg: $8,938 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
Retailer 13
Retailer 14
October 31, 2026
Retailer 8$3,934 USD
Retailer 3$4,714 USD
Retailer 14$4,883 USD
Retailer 5$5,157 USD
Retailer 7$5,690 USD
Retailer 12$5,861 USD
Retailer 9$7,558 USD
Retailer 13$7,559 USD
Retailer 2$7,905 USD
Retailer 11$9,223 USD
Retailer 10$11,888 USD
Retailer 4$13,565 USD
Retailer 6$17,376 USD
Brilliant Earth$17,990 USD

35 data points across 14 retailers

14 retailers$3,934 USD to $17,990 USD

A
Cheapest Retailer
-
$3,934 USD
£3,097 GBP
A
Retailer 2
-
$4,714 USD
View
Final sale: no returns
Retailer 3
-
$4,883 USD
View
Price last confirmed 19 days ago
A
Retailer 4
-
$5,157 USD
View
A
Retailer 5
-
$5,690 USD
View
A
Retailer 6
-
$5,861 USD
View
A
Retailer 7
-
$7,558 USD
ZAR 122,097 ZAR
View
Retailer 8
-
$7,559 USD
View
Price last confirmed 10 days ago
A
Retailer 9
-
$7,905 USD
€7,529 EUR
View
Retailer 10
-
$9,223 USD
A$14,189 AUD
View
Price last confirmed 9 days ago
B+
Retailer 11
-
$11,888 USD
View
B
Retailer 12
-
$13,565 USD
View
B
Retailer 13
-
$17,376 USD
View
Most Expensive
B
Brilliant Earth
20602619A · Oct 29
$17,990 USD
View
13 more retailers have this diamond
Prices start from $3,934 USDSave up to $14,056 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
15.65ct Cushion
$3,934 USD