Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 1555390060

Certificate GIA 1555390060

Diamond specifications and retailer prices

From $8,444 NZD
$4,759 USD
As of October 30, 2026
Save $7,386 NZD (47%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: $18,838 NZD at NZ Jewellers · As of September 19, 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 1555390060. Listed at 17 retailers as of October 29, 2026, with a 87% 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
FluorescenceFaint
Crown angle35.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1555390060
Dimensions7.27 × 7.31 × 4.57 mm
L/W Ratio1.01
Key to symbols
Twinning Wisp, Cloud, Crystal, Feather, Needle, Natural
Top View
7.27 mm7.31 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555390060
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 40.8°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 30
Current: $10,357 NZD|Low: $8,444 NZD|High: $16,792 NZD|Avg: $11,275 NZD|-2.1%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 8$8,444 NZD
Retailer 6$9,572 NZD
Retailer 2$10,204 NZD
Retailer 1$10,357 NZD
Retailer 7$10,823 NZD
Retailer 9$10,823 NZD
Retailer 5$11,178 NZD
Retailer 3$11,679 NZD
Retailer 10$11,788 NZD
Retailer 4$15,830 NZD

40 data points across 10 retailers

17 retailers$8,444 NZD to $15,830 NZD

A
Cheapest Retailer
-
$8,444 NZD
$4,759 USD
A
Retailer 2
-
$9,572 NZD
$5,395 USD
View
Retailer 3
-
$9,814 NZD
$5,531 USD
View
Price last confirmed 25 days ago
Retailer 4
-
$9,814 NZD
$5,531 USD
View
Price last confirmed 20 days ago
Retailer 5
-
$10,204 NZD
$5,751 USD
View
Price last confirmed 44 days ago
Retailer 6
-
$10,204 NZD
$5,751 USD
View
Price last confirmed 32 days ago
A
Retailer 7
-
$10,357 NZD
£4,596 GBP
View
A
Retailer 8
-
$10,823 NZD
$6,100 USD
View
A
Retailer 9
-
$10,823 NZD
$6,100 USD
View
A
Retailer 10
-
$11,178 NZD
$6,300 USD
View
Retailer 11
-
$11,322 NZD
$6,381 USD
View
Price last confirmed 22 days ago
A
Retailer 12
-
$11,679 NZD
€6,269 EUR
View
Retailer 13
-
$11,772 NZD
$6,635 USD
View
Price last confirmed 40 days ago
Retailer 14
-
$11,788 NZD
$6,644 USD
View
Price last confirmed 8 days ago
B+
Retailer 15
-
$15,830 NZD
£7,025 GBP
View
Retailer 16
-
$18,116 NZD
$10,210 USD
View
Price last confirmed 25 days ago
Most Expensive
NZ Jewellers
6ad84f01-e27b-4002-bd3a-7a6eb7c9473f · Sep 19
$18,838 NZD
$10,617 USD
View
Price last confirmed 42 days ago
16 more retailers have this diamond
Prices start from $8,444 NZDSave up to $7,386 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
$8,444 NZD