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Round|Lab Grown|IGI

2.56ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG618458044

Shape and cutting style on the report: Round brilliant

Certificate IGI LG618458044

Diamond specifications and retailer prices

From $463 USD
As of November 1, 2026
Save $1,887 USD (80%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $2,350 USD at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 2.56ct lab-grown round diamond

This 2.56ct lab-grown round sits in the two to three carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG618458044 or 618458044. Listed at 17 retailers as of October 31, 2026, with prices from $463 to $2,350, a $1,887 spread on the same certified stone. Brilliant Earth lists it at $2,350. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

2.56
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG618458044
Dimensions8.78 × 8.72 × 5.41 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
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
8.78 mm8.72 mm2.56 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG618458044
Side View
Table 57.0%Crown 34.1°Girdle: MediumPavilion 40.9°Culet: NoneDepth 61.8%

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: $2,350 USD|Low: $463 USD|High: $2,420 USD|Avg: $1,101 USD|-2.9%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 11$463 USD
Retailer 4$514 USD
Retailer 10$748 USD
Retailer 3$797 USD
Retailer 12$813 USD
Retailer 8$815 USD
Retailer 7$826 USD
Retailer 2$843 USD
Retailer 9$1,280 USD
Retailer 6$1,800 USD
Retailer 5$1,888 USD
Brilliant Earth$2,350 USD

42 data points across 12 retailers

17 retailers$463 USD to $2,350 USD

Retailer 1
-
$414 USD
Price last confirmed 40 days ago
A
Retailer 2
-
$463 USD
View
Final sale: no returns
Retailer 3
-
$464 USD
View
Price last confirmed 39 days ago
Retailer 4
-
$507 USD
View
Price last confirmed 41 days ago
Retailer 5
-
$748 USD
£589 GBP
View
Price last confirmed 16 days ago
B+
Retailer 6
-
$797 USD
View
B+
Retailer 7
-
$813 USD
View
B+
Retailer 8
-
$815 USD
View
A
Retailer 9
-
$826 USD
€787 EUR
View
A
Retailer 10
-
$843 USD
£664 GBP
View
B+
Retailer 11
-
$1,045 USD
View
B+
Retailer 12
-
$1,280 USD
View
Retailer 13
-
$1,652 USD
View
Price last confirmed 41 days ago
B
Retailer 14
-
$1,686 USD
View
B
Retailer 15
-
$1,800 USD
View
B
Retailer 16
-
$1,888 USD
£1,487 GBP
View
Most Expensive
B
Brilliant Earth
14981557A · Oct 31
$2,350 USD
View
16 more retailers have this diamond
Prices start from $463 USDSave up to $1,887 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
2.56ct Round
$463 USD