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Round|Lab Grown|IGI

2.56ct F SI1 Round Lab Grown Diamond

EX • F/SI1 • IGI LG816657303

Shape and cutting style on the report: Round brilliant

Certificate IGI LG816657303

Diamond specifications and retailer prices

From $280 USD
As of November 1, 2026
Save $1,240 USD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $1,520 USD at Rare Carat · As of November 1, 2026
View at Rare Carat

About this 2.56ct lab-grown round diamond

This 2.56ct lab-grown round sits in the two to three carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG816657303 or 816657303. Listed at 11 retailers as of November 1, 2026, with prices from $280 to $1,520, a $1,240 spread on the same certified stone. Rare Carat lists it at $1,520. 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
F
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.7°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816657303
Dimensions8.85 × 8.92 × 5.27 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.85 mm8.92 mm2.56 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816657303
Side View
Table 61.0%Crown 32.7°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 59.2%

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: $1,520 USD|Low: $269 USD|High: $1,650 USD|Avg: $913 USD|-5.9%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9$280 USD
Retailer 7$325 USD
Retailer 2$570 USD
Retailer 4$570 USD
Retailer 11$725 USD
Retailer 8$1,066 USD
Retailer 6$1,070 USD
Retailer 10$1,116 USD
Retailer 3$1,384 USD
Retailer 5$1,398 USD
Rare Carat$1,520 USD

36 data points across 11 retailers

11 retailers$280 USD to $1,520 USD

A
Cheapest Retailer
-
$280 USD
A
Retailer 2
-
$325 USD
View
A
Retailer 3
-
$570 USD
£449 GBP
View
A
Retailer 4
-
$570 USD
€543 EUR
View
A
Retailer 5
-
$725 USD
View
B+
Retailer 6
-
$1,066 USD
View
B
Retailer 7
-
$1,070 USD
View
B+
Retailer 8
-
$1,116 USD
View
Retailer 9
-
$1,384 USD
SGD 1,870 SGD
View
Price last confirmed 21 days ago
B
Retailer 10
-
$1,398 USD
£1,101 GBP
View
Most Expensive
B
Rare Carat
LGRD20-105742 · Nov 1
$1,520 USD
View
10 more retailers have this diamond
Prices start from $280 USDSave up to $1,240 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
$280 USD