Cushion|Lab Grown|IGI

2.51ct E IF Cushion Lab Grown Diamond

EX • E/IF • IGI LG812620732

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

Certificate IGI LG812620732

Diamond specifications and retailer prices

From $1,210 USD
As of October 31, 2026
Save $4,120 USD (77%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $5,330 USD at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 2.51ct lab-grown cushion diamond

This 2.51ct lab-grown cushion sits in the two to three carat band, graded E colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG812620732 or 812620732. Listed at 18 retailers as of October 30, 2026, with prices from $1,210 to $5,330, a $4,120 spread on the same certified stone. Brilliant Earth lists it at $5,330. 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

2.51
Carat
E
Color
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle39.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG812620732
Dimensions8.06 × 7.90 × 5.18 mm
L/W Ratio1.02
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
8.06 mm7.90 mm2.51 ctE / IF
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG812620732
Side View
Table 64.0%Crown 34.8°Girdle: MED-THKPavilion 39.7°Culet: NoneDepth 65.6%

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 31
Current: $5,330 USD|Low: $1,210 USD|High: $6,220 USD|Avg: $3,210 USD|-14.3%
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
Retailer 17
Retailer 18
October 31, 2026
Retailer 3$1,210 USD
Retailer 9$1,351 USD
Retailer 12$1,400 USD
Retailer 11$1,817 USD
Retailer 6$1,888 USD
Retailer 2$1,997 USD
Retailer 13$2,369 USD
Retailer 17$2,638 USD
Retailer 7$3,205 USD
Retailer 4$3,232 USD
Retailer 14$3,236 USD
Retailer 18$3,632 USD
Retailer 10$3,734 USD
Retailer 16$4,006 USD
Retailer 15$4,276 USD
Retailer 5$4,382 USD
Retailer 8$4,930 USD
Brilliant Earth$5,330 USD

35 data points across 18 retailers

18 retailers$1,210 USD to $5,330 USD

A
Cheapest Retailer
-
$1,210 USD
Final sale: no returns
Retailer 2
-
$1,351 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$1,400 USD
View
A
Retailer 4
-
$1,817 USD
£1,431 GBP
View
A
Retailer 5
-
$1,888 USD
View
A
Retailer 6
-
$1,997 USD
€1,902 EUR
View
A
Retailer 7
-
$2,369 USD
View
A
Retailer 8
-
$2,638 USD
View
Retailer 9
-
$3,205 USD
A$4,930 AUD
View
Price last confirmed 9 days ago
A
Retailer 10
-
$3,232 USD
View
A
Retailer 11
-
$3,236 USD
ZAR 52,273 ZAR
View
B+
Retailer 12
-
$3,632 USD
View
Retailer 13
-
$3,734 USD
£2,940 GBP
View
Price last confirmed 7 days ago
B+
Retailer 14
-
$4,006 USD
View
B+
Retailer 15
-
$4,276 USD
£3,367 GBP
View
B+
Retailer 16
-
$4,382 USD
View
Retailer 17
-
$4,930 USD
View
Price last confirmed 12 days ago
Most Expensive
B+
Brilliant Earth
20896257A · Oct 30
$5,330 USD
View
17 more retailers have this diamond
Prices start from $1,210 USDSave up to $4,120 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
2.51ct Cushion
$1,210 USD