Radiant|Lab Grown|IGI

2.50ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG517202271

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG517202271

Diamond specifications and retailer prices

From $2,170 USD
As of October 31, 2026
Save $7,778 USD (78%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $12,148 USD at Reve Diamonds · As of November 1, 2026
View at Reve Diamonds

About this 2.5ct lab-grown radiant diamond

This 2.5ct lab-grown radiant sits in the two to three carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG517202271 or 517202271. Listed at 14 retailers as of October 31, 2026, with a 358% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

2.50
Carat
G
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48.7°
Pavilion angle31°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517202271
Dimensions8.56 × 6.69 × 4.67 mm
L/W Ratio1.28
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
8.56 mm6.69 mm2.50 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517202271
Side View
Table 68.0%Crown 48.7°Girdle: MED-STKPavilion 31°Culet: NoneDepth 69.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $9,948 USD|Low: $2,170 USD|High: $12,148 USD|Avg: $6,469 USD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Reve Diamonds
November 1, 2026
Retailer 5$2,170 USD
Retailer 4$4,004 USD
Retailer 8$4,483 USD
Retailer 6$4,644 USD
Retailer 2$6,048 USD
Retailer 3$6,159 USD
Retailer 7$7,193 USD
Retailer 1$9,948 USD
Reve Diamonds$12,148 USD

43 data points across 9 retailers

14 retailers$2,170 USD to $9,948 USD

B+
Cheapest Retailer
-
$2,170 USD
B
Retailer 2
-
$4,004 USD
View
B
Retailer 3
-
$4,196 USD
View
B
Retailer 4
-
$4,222 USD
View
B
Retailer 5
-
$4,483 USD
View
Final sale: no returns
B
Retailer 6
-
$4,644 USD
View
Retailer 7
-
$4,644 USD
View
Price last confirmed 20 days ago
B
Retailer 8
-
$4,700 USD
View
B
Retailer 9
-
$5,803 USD
View
B
Retailer 10
-
$6,048 USD
£4,762 GBP
View
B
Retailer 11
-
$6,159 USD
View
B
Retailer 12
-
$7,193 USD
View
B
Retailer 13
-
$9,948 USD
£7,833 GBP
View
Most Expensive
Reve Diamonds
3AD94A70C · Nov 1
$12,148 USD
View
Price under review
13 more retailers have this diamond
Prices start from $2,170 USDSave up to $7,778 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.

B+
2.50ct Radiant
$2,170 USD