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Radiant|Natural|GIA

1.51ct H SI2 Radiant Natural Diamond

EX • H/SI2 • GIA 1555665977

Certificate GIA 1555665977

Diamond specifications and retailer prices

From $6,757 AUD
As of November 4, 2026
Save $6,600 AUD (49%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $13,358 AUD at NZ Jewellers · As of November 5, 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 H 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 1555665977. Listed at 15 retailers as of November 4, 2026, with prices from $6,757 to $13,358, a $6,600 spread on the same certified stone. NZ Jewellers lists it at $13,358. 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
H
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.22°
OriginNatural
Grading LabGIA
CertificateGIA 1555665977
Dimensions7.78 × 5.83 × 3.99 mm
L/W Ratio1.33
Culet sizeNone
Key to symbols
Crystal, Cloud
Top View
7.78 mm5.83 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1555665977
Side View
Table 68.0%Crown 43.22°Girdle: Slightly ThickPavilionCulet: NoneDepth 68.4%

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 4
Current: $13,358 AUD|Low: $6,546 AUD|High: $13,502 AUD|Avg: $8,714 AUD|-1.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 7, 2026
Retailer 4$6,757 AUD
Retailer 14$6,966 AUD
Retailer 3$7,372 AUD
Retailer 7$7,695 AUD
Retailer 2$7,715 AUD
Retailer 5$7,986 AUD
Retailer 6$7,986 AUD
Retailer 12$7,986 AUD
Retailer 13$8,210 AUD
Retailer 11$8,355 AUD
Retailer 8$8,987 AUD
Retailer 10$9,216 AUD
Retailer 9$12,687 AUD
NZ Jewellers$13,358 AUD

29 data points across 14 retailers

15 retailers$6,757 AUD to $13,358 AUD

A
Cheapest Retailer
-
$6,757 AUD
A
Retailer 2
-
$6,966 AUD
View
A
Retailer 3
-
$7,372 AUD
View
Final sale: no returns
A
Retailer 4
-
$7,695 AUD
View
A
Retailer 5
-
$7,715 AUD
View
Retailer 6
-
$7,986 AUD
View
Price last confirmed 9 days ago
A
Retailer 7
-
$7,986 AUD
View
A
Retailer 8
-
$7,986 AUD
View
A
Retailer 9
-
$8,210 AUD
View
B+
Retailer 10
-
$8,355 AUD
View
B+
Retailer 11
-
$8,987 AUD
View
B+
Retailer 12
-
$9,216 AUD
View
Retailer 13
-
$9,315 AUD
View
Price last confirmed 17 days ago
B
Retailer 14
-
$12,687 AUD
View
Most Expensive
B
NZ Jewellers
4550dc16-0292-4ea4-b8e9-ba98c68b4e06 · Nov 5
$13,358 AUD
$9,178 USD
View
14 more retailers have this diamond
Prices start from $6,757 AUDSave up to $6,600 AUD

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
$6,757 AUD