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Radiant|Natural|GIA

0.51ct I SI2 Radiant Natural Diamond

EX • I/SI2 • GIA 2215619618

Certificate GIA 2215619618

Diamond specifications and retailer prices

From $1,262 NZD
$711 USD
As of November 2, 2026
Save $878 NZD (41%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $2,140 NZD at 77 Diamonds · As of November 2, 2026
View at 77 Diamonds

About this 0.51ct natural radiant diamond

This 0.51ct natural radiant sits in the half to three-quarter carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2215619618. Listed at 6 retailers as of November 2, 2026, with prices from $1,262 to $2,140, a $878 spread on the same certified stone. 77 Diamonds lists it at $2,140. 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

0.51
Carat
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2215619618
Dimensions5.87 × 3.85 × 2.58 mm
L/W Ratio1.52
Culet sizeNone
Top View
5.87 mm3.85 mm0.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2215619618
Side View
Table 70.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 66.9%

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 2
Current: $2,140 NZD|Low: $1,146 NZD|High: $2,161 NZD|Avg: $1,723 NZD|+0.1%
77 Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 2$1,262 NZD
Retailer 5$1,476 NZD
Retailer 4$1,810 NZD
Retailer 6$1,810 NZD
Retailer 3$1,863 NZD
77 Diamonds$2,140 NZD

37 data points across 6 retailers

6 retailers$1,262 NZD to $2,140 NZD

B+
Cheapest Retailer
-
$1,262 NZD
$711 USD
Final sale: no returns
B+
Retailer 2
-
$1,476 NZD
$832 USD
View
B
Retailer 3
-
$1,810 NZD
$1,020 USD
View
B
Retailer 4
-
$1,810 NZD
$1,020 USD
View
B
Retailer 5
-
$1,863 NZD
$1,050 USD
View
Most Expensive
B
77 Diamonds
RADMB5PMVXPDB · Nov 2
$2,140 NZD
£950 GBP
View
5 more retailers have this diamond
Prices start from $1,262 NZDSave up to $878 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+
0.51ct Radiant
$1,262 NZD