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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 $5,261 USD
HK$41,100 HKD
As of October 31, 2026
Save $6,683 USD (56%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $11,944 USD 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 $5,261 to $11,944, a $6,683 spread on the same certified stone. NZ Jewellers lists it at $11,944. 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
Color
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: Oct 31
Current: $11,944 USD|Low: $5,178 USD|High: $11,944 USD|Avg: $7,387 USD
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 1, 2026
Retailer 12$5,261 USD
Retailer 16$5,285 USD
Retailer 5$5,643 USD
Retailer 7$5,971 USD
Retailer 3$6,470 USD
Retailer 6$6,470 USD
Retailer 15$6,470 USD
Retailer 11$6,803 USD
Retailer 13$7,134 USD
Retailer 8$7,190 USD
Retailer 17$7,190 USD
Retailer 14$7,430 USD
Retailer 4$7,465 USD
Retailer 9$7,871 USD
Retailer 2$8,625 USD
Retailer 10$10,522 USD
NZ Jewellers$11,944 USD

38 data points across 17 retailers

17 retailers$5,261 USD to $11,944 USD

A
Cheapest Retailer
-
$5,261 USD
HK$41,100 HKD
A
Retailer 2
-
$5,285 USD
View
B+
Retailer 3
-
$5,643 USD
View
B+
Retailer 4
-
$5,971 USD
View
Final sale: no returns
B+
Retailer 5
-
$6,470 USD
View
B+
Retailer 6
-
$6,470 USD
View
B+
Retailer 7
-
$6,470 USD
View
B+
Retailer 8
-
$6,803 USD
£5,357 GBP
View
B+
Retailer 9
-
$7,134 USD
€6,794 EUR
View
B
Retailer 10
-
$7,190 USD
View
B+
Retailer 11
-
$7,190 USD
View
B
Retailer 12
-
$7,430 USD
View
B
Retailer 13
-
$7,465 USD
View
Retailer 14
-
$7,871 USD
View
Price last confirmed 9 days ago
B
Retailer 15
-
$8,625 USD
£6,791 GBP
View
B
Retailer 16
-
$10,522 USD
£8,285 GBP
View
Most Expensive
B
NZ Jewellers
1b7dad14-d83a-4a6a-990d-39a4c693f98f · Oct 30
$11,944 USD
View
16 more retailers have this diamond
Prices start from $5,261 USDSave up to $6,683 USD

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
$5,261 USD