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Radiant|Natural|GIA

1.51ct J SI1 Radiant Natural Diamond

ID • J/SI1 • GIA 1236729301

Certificate GIA 1236729301

Diamond specifications and retailer prices

From $4,876 NZD
As of November 2, 2026
Save $5,722 NZD (54%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $10,598 NZD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural radiant diamond

This 1.51ct natural radiant sits in the one-and-a-half to two carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1236729301. Listed at 8 retailers as of November 2, 2026, with prices from $4,876 to $10,598, a $5,722 spread on the same certified stone. NZ Jewellers lists it at $10,598. 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

1.51
Carat
J
Colour
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle44.89°
Pavilion angle31.06°
OriginNatural
Grading LabGIA
CertificateGIA 1236729301
Dimensions7.31 × 5.60 × 3.89 mm
L/W Ratio1.31
Girdle conditionVery Thick
Key to symbols
Crystal, Feather, Needle, Indented Natural
Top View
7.31 mm5.60 mm1.51 ctJ / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1236729301
Side View
Table 67.0%Crown 44.89°Girdle: ThickPavilion 31.06°Culet: NoneDepth 69.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $10,598 NZD|Low: $4,874 NZD|High: $11,038 NZD|Avg: $6,476 NZD|-4.0%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 3$4,876 NZD
Retailer 5$4,970 NZD
Retailer 7$5,069 NZD
Retailer 4$5,264 NZD
Retailer 6$5,336 NZD
Retailer 8$5,736 NZD
Retailer 10$5,975 NZD
Retailer 9$6,258 NZD
Retailer 2$8,881 NZD
NZ Jewellers$10,598 NZD

35 data points across 10 retailers

8 retailers$4,876 NZD to $10,598 NZD

A
Cheapest Retailer
-
$4,876 NZD
A
Retailer 2
-
$4,970 NZD
View
A
Retailer 3
-
$5,069 NZD
View
A
Retailer 4
-
$5,264 NZD
View
Retailer 5
-
$5,336 NZD
View
Price last confirmed 9 days ago
Retailer 6
-
$5,736 NZD
View
Price last confirmed 31 days ago
B+
Retailer 7
-
$8,881 NZD
View
Most Expensive
B
NZ Jewellers
ba55ec91-1321-4ed6-b548-4f3c073efa7c · Nov 3
$10,598 NZD
$5,875 USD
View
7 more retailers have this diamond
Prices start from $4,876 NZDSave up to $5,722 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.

A
1.51ct Radiant
$4,876 NZD