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Round|Natural|GIA

1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2557586665

Certificate GIA 2557586665

Diamond specifications and retailer prices

From $7,489 AUD
HK$41,100 HKD
As of November 1, 2026
Save $9,514 AUD (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $17,003 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round 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 and certified by GIA 2557586665. Listed at 17 retailers as of October 30, 2026, with prices from $7,489 to $17,003, a $9,514 spread on the same certified stone. NZ Jewellers lists it at $17,003. 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

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2557586665
Dimensions7.25 × 7.31 × 4.56 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Feather, Needle
Top View
7.25 mm7.31 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557586665
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.7%

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 1
Current: $17,003 AUD|Low: $7,371 AUD|High: $17,003 AUD|Avg: $10,519 AUD
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
Retailer 15
Retailer 16
Retailer 17
November 2, 2026
Retailer 13$7,489 AUD
Retailer 16$7,524 AUD
Retailer 5$8,033 AUD
Retailer 7$8,500 AUD
Retailer 3$9,211 AUD
Retailer 6$9,211 AUD
Retailer 15$9,211 AUD
Retailer 10$9,685 AUD
Retailer 2$10,111 AUD
Retailer 8$10,236 AUD
Retailer 17$10,236 AUD
Retailer 14$10,577 AUD
Retailer 4$10,627 AUD
Retailer 9$11,205 AUD
Retailer 11$12,278 AUD
Retailer 12$14,979 AUD
NZ Jewellers$17,003 AUD

39 data points across 17 retailers

17 retailers$7,489 AUD to $17,003 AUD

A
Cheapest Retailer
-
$7,489 AUD
HK$41,100 HKD
A
Retailer 2
-
$7,524 AUD
$5,285 USD
View
B+
Retailer 3
-
$8,033 AUD
$5,643 USD
View
B+
Retailer 4
-
$8,500 AUD
$5,971 USD
View
Final sale: no returns
B+
Retailer 5
-
$9,211 AUD
$6,470 USD
View
B+
Retailer 6
-
$9,211 AUD
$6,470 USD
View
B+
Retailer 7
-
$9,211 AUD
$6,470 USD
View
B+
Retailer 8
-
$9,685 AUD
£5,357 GBP
View
B+
Retailer 9
-
$10,111 AUD
€6,764 EUR
View
B
Retailer 10
-
$10,236 AUD
$7,190 USD
View
B+
Retailer 11
-
$10,236 AUD
$7,190 USD
View
B
Retailer 12
-
$10,577 AUD
$7,430 USD
View
B
Retailer 13
-
$10,627 AUD
$7,465 USD
View
Retailer 14
-
$11,205 AUD
$7,871 USD
View
Price last confirmed 10 days ago
B
Retailer 15
-
$12,278 AUD
£6,791 GBP
View
B
Retailer 16
-
$14,979 AUD
£8,285 GBP
View
Most Expensive
B
NZ Jewellers
1b7dad14-d83a-4a6a-990d-39a4c693f98f · Oct 30
$17,003 AUD
$11,944 USD
View
16 more retailers have this diamond
Prices start from $7,489 AUDSave up to $9,514 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 Round
$7,489 AUD