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Cushion|Lab Grown|IGI

1.51ct F VS1 Cushion Lab Grown Diamond

ID • F/VS1 • IGI LG828685808

Shape and cutting style on the report: Square cushion modified brilliant

Certificate IGI LG828685808

Diamond specifications and retailer prices

From $290 USD
As of November 1, 2026
Save $1,560 USD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,850 USD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 1.51ct lab-grown cushion diamond

This 1.51ct lab-grown cushion sits in the one-and-a-half to two carat band, graded F colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG828685808 or 828685808. Listed at 16 retailers as of November 1, 2026, with prices from $290 to $1,850, a $1,560 spread on the same certified stone. Brilliant Earth lists it at $1,850. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.51
Carat
F
Color
VS1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle39.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG828685808
Dimensions6.65 × 6.61 × 4.45 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
6.65 mm6.61 mm1.51 ctF / VS1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG828685808
Side View
Table 59.0%Crown 34°Girdle: MED-THKPavilion 39.6°Culet: NoneDepth 67.3%

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: Nov 1
Current: $1,850 USD|Low: $228 USD|High: $1,850 USD|Avg: $685 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
Retailer 14
Retailer 15
Retailer 16
November 2, 2026
Retailer 8$263 USD
Retailer 15$290 USD
Retailer 11$319 USD
Retailer 16$448 USD
Retailer 4$466 USD
Retailer 13$471 USD
Retailer 12$508 USD
Retailer 3$511 USD
Retailer 10$638 USD
Retailer 9$731 USD
Retailer 7$930 USD
Retailer 14$1,010 USD
Retailer 2$1,093 USD
Retailer 5$1,111 USD
Retailer 6$1,258 USD
Brilliant Earth$1,850 USD

19 data points across 16 retailers

16 retailers$290 USD to $1,850 USD

Retailer 1
-
$263 USD
Price last confirmed 9 days ago
A
Retailer 2
-
$290 USD
View
Final sale: no returns
A
Retailer 3
-
$319 USD
£251 GBP
View
A
Retailer 4
-
$448 USD
€427 EUR
View
A
Retailer 5
-
$466 USD
View
A
Retailer 6
-
$471 USD
ZAR 7,614 ZAR
View
A
Retailer 7
-
$508 USD
£400 GBP
View
A
Retailer 8
-
$511 USD
View
A
Retailer 9
-
$638 USD
A$981 AUD
View
B+
Retailer 10
-
$731 USD
View
B+
Retailer 11
-
$930 USD
View
B+
Retailer 12
-
$1,010 USD
View
B
Retailer 13
-
$1,093 USD
£861 GBP
View
B
Retailer 14
-
$1,111 USD
View
B
Retailer 15
-
$1,258 USD
View
Most Expensive
B
Brilliant Earth
22335345A · Nov 2
$1,850 USD
View
15 more retailers have this diamond
Prices start from $290 USDSave up to $1,560 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
1.51ct Cushion
$290 USD