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2.51ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1558302144

Certificate GIA 1558302144

Diamond specifications and retailer prices

From $37,670 NZD
$21,195 USD
As of November 1, 2026
Save $17,032 NZD (31%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $54,702 NZD at Diamonds Direct · As of November 1, 2026
View at Diamonds Direct

About this 2.51ct natural round diamond

This 2.51ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1558302144. Listed at 13 retailers as of November 1, 2026, with prices from $37,670 to $54,702, a $17,032 spread on the same certified stone. Diamonds Direct lists it at $54,702. 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

2.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 1558302144
Dimensions8.60 × 8.64 × 5.41 mm
L/W Ratio1.00
Culet sizeNone
Top View
8.60 mm8.64 mm2.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558302144
Side View
Table 56.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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 1
Current: $54,702 NZD|Low: $36,430 NZD|High: $68,012 NZD|Avg: $45,546 NZD|-4.2%
Diamonds Direct
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
November 2, 2026
Retailer 9$37,670 NZD
Retailer 10$39,019 NZD
Retailer 15$39,184 NZD
Retailer 4$39,992 NZD
Retailer 5$41,237 NZD
Retailer 8$41,567 NZD
Retailer 11$42,769 NZD
Retailer 13$45,104 NZD
Retailer 16$45,694 NZD
Retailer 12$45,770 NZD
Retailer 6$46,342 NZD
Retailer 14$46,512 NZD
Retailer 2$48,058 NZD
Retailer 3$51,513 NZD
Diamonds Direct$54,702 NZD
Retailer 7$66,651 NZD

38 data points across 16 retailers

13 retailers$37,670 NZD to $54,702 NZD

B+
Cheapest Retailer
-
$37,670 NZD
$21,195 USD
B+
Retailer 2
-
$39,019 NZD
$21,954 USD
View
B+
Retailer 3
-
$39,184 NZD
SGD 29,793 SGD
View
Retailer 4
-
$41,567 NZD
$23,388 USD
View
Price last confirmed 28 days ago
B
Retailer 5
-
$42,769 NZD
$24,064 USD
View
B
Retailer 6
-
$45,104 NZD
$25,378 USD
View
B
Retailer 7
-
$45,694 NZD
$25,710 USD
View
B
Retailer 8
-
$45,770 NZD
$25,752 USD
View
B+
Retailer 9
-
$46,512 NZD
$26,170 USD
View
B
Retailer 10
-
$48,058 NZD
$27,040 USD
View
B
Retailer 11
-
$49,452 NZD
$27,824 USD
View
B
Retailer 12
-
$51,513 NZD
$28,984 USD
View
Most Expensive
B
Diamonds Direct
1136884 · Nov 1
$54,702 NZD
$30,778 USD
View
12 more retailers have this diamond
Prices start from $37,670 NZDSave up to $17,032 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+
2.51ct Round
$37,670 NZD