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Radiant|Lab Grown|IGI

2.51ct G SI1 Radiant Lab Grown Diamond

ID • G/SI1 • IGI LG517226310

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

Certificate IGI LG517226310

Diamond specifications and retailer prices

From $3,536 NZD
As of November 6, 2026
Save $14,428 NZD (80%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $21,996 NZD at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 2.51ct lab-grown radiant diamond

This 2.51ct 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 LG517226310 or 517226310. Listed at 14 retailers as of November 5, 2026, with a 408% 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

2.51
Carat
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle48°
Pavilion angle31.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG517226310
Dimensions8.72 × 6.66 × 4.68 mm
L/W Ratio1.31
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
8.72 mm6.66 mm2.51 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG517226310
Side View
Table 69.0%Crown 48°Girdle: STK-THKPavilion 31.9°Culet: NoneDepth 70.3%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: $10,935 NZD|Low: $3,536 NZD|High: $21,996 NZD|Avg: $11,609 NZD|-2.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Reve Diamonds
November 7, 2026
Retailer 5$3,536 NZD
Retailer 4$7,250 NZD
Retailer 8$8,119 NZD
Retailer 6$8,410 NZD
Retailer 1$10,935 NZD
Retailer 3$11,154 NZD
Retailer 7$13,022 NZD
Retailer 2$17,963 NZD
Reve Diamonds$21,996 NZD

45 data points across 9 retailers

14 retailers$3,536 NZD to $17,963 NZD

B+
Cheapest Retailer
-
$3,536 NZD
B
Retailer 2
-
$7,250 NZD
View
B
Retailer 3
-
$7,598 NZD
View
B
Retailer 4
-
$7,647 NZD
View
B
Retailer 5
-
$8,119 NZD
View
Final sale: no returns
B
Retailer 6
-
$8,410 NZD
View
Retailer 7
-
$8,410 NZD
View
Price last confirmed 26 days ago
B
Retailer 8
-
$8,505 NZD
View
B
Retailer 9
-
$10,508 NZD
View
B
Retailer 10
-
$10,935 NZD
View
B
Retailer 11
-
$11,154 NZD
View
B
Retailer 12
-
$13,022 NZD
View
B
Retailer 13
-
$17,963 NZD
View
Most Expensive
Reve Diamonds
9D25E17C9 · Nov 6
$21,996 NZD
$12,194 USD
View
Price under review
13 more retailers have this diamond
Prices start from $3,536 NZDSave up to $14,428 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.

B+
2.51ct Radiant
$3,536 NZD