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Round|Natural|GIA

1.51ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6511657389

Certificate GIA 6511657389

Diamond specifications and retailer prices

From $10,288 NZD
HK$45,300 HKD
As of October 31, 2026
Save $9,109 NZD (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $23,753 NZD at NZ Jewellers · As of September 25, 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 6511657389. Listed at 14 retailers as of October 29, 2026, with a 89% 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 angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6511657389
Dimensions7.32 × 7.28 × 4.51 mm
L/W Ratio1.01
Top View
7.32 mm7.28 mm1.51 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6511657389
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.0%

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: $11,393 NZD|Low: $10,016 NZD|High: $20,030 NZD|Avg: $12,775 NZD|+4.2%
Retailer 1
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
October 31, 2026
Retailer 2$10,202 NZD
Retailer 7$10,288 NZD
Retailer 9$10,562 NZD
Retailer 11$10,994 NZD
Retailer 1$11,393 NZD
Retailer 13$11,440 NZD
Retailer 14$12,053 NZD
Retailer 8$12,370 NZD
Retailer 12$12,385 NZD
Retailer 3$13,377 NZD
Retailer 6$13,560 NZD
Retailer 5$14,470 NZD
Retailer 4$14,779 NZD
Retailer 10$19,397 NZD

37 data points across 14 retailers

14 retailers$10,288 NZD to $19,397 NZD

Retailer 1
-
$10,202 NZD
$5,750 USD
Price last confirmed 10 days ago
A
Retailer 2
-
$10,288 NZD
HK$45,300 HKD
View
A
Retailer 3
-
$10,562 NZD
$5,953 USD
View
A
Retailer 4
-
$10,994 NZD
$6,196 USD
View
A
Retailer 5
-
$11,393 NZD
$6,421 USD
View
Final sale: no returns
A
Retailer 6
-
$11,440 NZD
$6,448 USD
View
A
Retailer 7
-
$12,053 NZD
$6,793 USD
View
A
Retailer 8
-
$12,370 NZD
£5,489 GBP
View
A
Retailer 9
-
$12,385 NZD
$6,980 USD
View
A
Retailer 10
-
$13,377 NZD
SGD 10,188 SGD
View
A
Retailer 11
-
$13,560 NZD
A$11,758 AUD
View
Retailer 12
-
$14,470 NZD
$8,155 USD
View
Price last confirmed 8 days ago
B+
Retailer 13
-
$19,397 NZD
£8,608 GBP
View
Most Expensive
NZ Jewellers
67d7e602-8786-4201-9a30-7eff39b7dc82 · Sep 25
$23,753 NZD
$13,387 USD
View
Price last confirmed 36 days ago
13 more retailers have this diamond
Prices start from $10,288 NZDSave up to $9,109 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
$10,288 NZD