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Cushion|Lab Grown|IGI

3.18ct I VS1 Cushion Lab Grown Diamond

ID • I/VS1 • IGI LG831678522

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG831678522

Diamond specifications and retailer prices

From $1,512 USD
As of November 2, 2026
Save $3,982 USD (72%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $5,494 USD at Taylor and Hart · As of October 31, 2026
View at Taylor and Hart

About this 3.18ct lab-grown cushion diamond

This 3.18ct lab-grown cushion sits in the three to five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG831678522 or 831678522. Listed at 11 retailers as of October 31, 2026, with prices from $1,512 to $5,494, a $3,982 spread on the same certified stone. Taylor and Hart lists it at $5,494. 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

3.18
Carat
I
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.5°
Pavilion angle35.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831678522
Dimensions10.91 × 7.38 × 4.85 mm
L/W Ratio1.48
Girdle conditionFaceted
Culet sizeLarge
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.91 mm7.38 mm3.18 ctI / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831678522
Side View
Table 49.0%Crown 37.5°Girdle: STK-VTKPavilion 35.1°Culet: LargeDepth 65.7%

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: Nov 2
Current: $2,269 USD|Low: $1,472 USD|High: $5,995 USD|Avg: $2,832 USD|+2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Taylor and Hart
November 2, 2026
Retailer 5$1,512 USD
Retailer 2$1,651 USD
Retailer 9$1,703 USD
Retailer 7$1,735 USD
Retailer 4$1,869 USD
Retailer 1$2,269 USD
Retailer 3$2,471 USD
Retailer 6$3,631 USD
Retailer 8$3,770 USD
Retailer 10$4,769 USD
Taylor and Hart$5,494 USD

30 data points across 11 retailers

11 retailers$1,512 USD to $5,494 USD

A
Cheapest Retailer
-
$1,512 USD
B+
Retailer 2
-
$1,651 USD
HK$12,900 HKD
View
Retailer 3
-
$1,703 USD
View
Price last confirmed 21 days ago
B+
Retailer 4
-
$1,735 USD
View
B+
Retailer 5
-
$1,869 USD
View
B
Retailer 6
-
$2,269 USD
€2,161 EUR
View
B+
Retailer 7
-
$2,471 USD
View
B
Retailer 8
-
$3,631 USD
ZAR 58,653 ZAR
View
B
Retailer 9
-
$3,770 USD
View
B
Retailer 10
-
$4,769 USD
SGD 6,445 SGD
View
Most Expensive
B
Taylor and Hart
ELF52IJ · Oct 31
$5,494 USD
View
10 more retailers have this diamond
Prices start from $1,512 USDSave up to $3,982 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
3.18ct Cushion
$1,512 USD