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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 $2,147 NZD
$1,210 USD
As of October 31, 2026
Save $7,310 NZD (77%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $9,457 NZD 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 $2,147 to $9,457, a $7,310 spread on the same certified stone. Brilliant Earth lists it at $9,457. 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
Colour
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

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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 31
Current: $9,457 NZD|Low: $2,147 NZD|High: $11,036 NZD|Avg: $5,693 NZD|-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$2,147 NZD
Retailer 9$2,397 NZD
Retailer 11$2,484 NZD
Retailer 2$3,224 NZD
Retailer 6$3,350 NZD
Retailer 13$3,570 NZD
Retailer 12$4,203 NZD
Retailer 17$4,681 NZD
Retailer 7$5,686 NZD
Retailer 4$5,734 NZD
Retailer 14$5,741 NZD
Retailer 18$6,444 NZD
Retailer 10$6,625 NZD
Retailer 16$7,107 NZD
Retailer 15$7,587 NZD
Retailer 5$7,775 NZD
Retailer 8$8,747 NZD
Brilliant Earth$9,457 NZD

36 data points across 18 retailers

18 retailers$2,147 NZD to $9,457 NZD

A
Cheapest Retailer
-
$2,147 NZD
$1,210 USD
Final sale: no returns
Retailer 2
-
$2,397 NZD
$1,351 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$2,484 NZD
$1,400 USD
View
A
Retailer 4
-
$3,224 NZD
£1,431 GBP
View
A
Retailer 5
-
$3,350 NZD
$1,888 USD
View
A
Retailer 6
-
$3,570 NZD
€1,916 EUR
View
A
Retailer 7
-
$4,203 NZD
$2,369 USD
View
A
Retailer 8
-
$4,681 NZD
$2,638 USD
View
Retailer 9
-
$5,686 NZD
A$4,930 AUD
View
Price last confirmed 9 days ago
A
Retailer 10
-
$5,734 NZD
$3,232 USD
View
A
Retailer 11
-
$5,741 NZD
ZAR 52,273 ZAR
View
B+
Retailer 12
-
$6,444 NZD
$3,632 USD
View
Retailer 13
-
$6,625 NZD
£2,940 GBP
View
Price last confirmed 7 days ago
B+
Retailer 14
-
$7,107 NZD
$4,006 USD
View
B+
Retailer 15
-
$7,587 NZD
£3,367 GBP
View
B+
Retailer 16
-
$7,775 NZD
$4,382 USD
View
Retailer 17
-
$8,747 NZD
$4,930 USD
View
Price last confirmed 12 days ago
Most Expensive
B+
Brilliant Earth
20896257A · Oct 30
$9,457 NZD
$5,330 USD
View
17 more retailers have this diamond
Prices start from $2,147 NZDSave up to $7,310 NZD

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
$2,147 NZD