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Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1515513768

Certificate GIA 1515513768

Diamond specifications and retailer prices

From $12,773 NZD
As of November 1, 2026
Save $8,094 NZD (39%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $25,111 NZD at NZ Jewellers · As of September 26, 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 D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1515513768. Listed at 14 retailers as of November 1, 2026, with a 63% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1515513768
Dimensions7.46 × 7.41 × 4.49 mm
L/W Ratio1.01
Star length55%
Lower girdle75%
Key to symbols
Crystal, Needle
Top View
7.46 mm7.41 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1515513768
Side View
Table 59.0%Crown 33°Girdle: MED-STKPavilion 41°Culet: NoneDepth 60.5%

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: $13,939 NZD|Low: $11,339 NZD|High: $21,174 NZD|Avg: $14,518 NZD|-2.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 8$11,374 NZD
Retailer 9$12,773 NZD
Retailer 2$12,977 NZD
Retailer 10$13,858 NZD
Retailer 7$13,859 NZD
Retailer 1$13,939 NZD
Retailer 6$15,245 NZD
Retailer 4$15,411 NZD
Retailer 5$16,339 NZD
Retailer 3$20,866 NZD

35 data points across 10 retailers

14 retailers$12,773 NZD to $20,866 NZD

Retailer 1
-
$11,374 NZD
Price last confirmed 14 days ago
Retailer 2
-
$11,901 NZD
View
Price last confirmed 14 days ago
A
Retailer 3
-
$12,773 NZD
View
A
Retailer 4
-
$12,977 NZD
View
B+
Retailer 5
-
$13,858 NZD
View
Final sale: no returns
Retailer 6
-
$13,859 NZD
View
Price last confirmed 12 days ago
A
Retailer 7
-
$13,939 NZD
View
Retailer 8
-
$15,014 NZD
View
Price last confirmed 43 days ago
B+
Retailer 9
-
$15,245 NZD
View
B+
Retailer 10
-
$15,336 NZD
View
B+
Retailer 11
-
$15,411 NZD
View
B+
Retailer 12
-
$16,339 NZD
View
B+
Retailer 13
-
$20,866 NZD
View
Most Expensive
NZ Jewellers
85fadae0-54e4-4486-b836-b4c51b766ad7 · Sep 26
$25,111 NZD
$14,116 USD
View
Price last confirmed 40 days ago
13 more retailers have this diamond
Prices start from $12,773 NZDSave up to $8,094 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 Round
$12,773 NZD