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Round|Natural|GIA

1.51ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2146020726

Certificate GIA 2146020726

Diamond specifications and retailer prices

From $25,443 NZD
$14,340 USD
As of November 1, 2026
Save $17,323 NZD (41%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $50,730 NZD at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2146020726. Listed at 21 retailers as of November 1, 2026, with a 68% 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2146020726
Dimensions7.39 × 7.35 × 4.51 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.39 mm7.35 mm1.51 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2146020726
Side View
Table 60.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 61.1%

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: $30,050 NZD|Low: $24,258 NZD|High: $46,009 NZD|Avg: $33,290 NZD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$25,443 NZD
Retailer 7$27,897 NZD
Retailer 1$30,050 NZD
Retailer 5$30,544 NZD
Retailer 8$31,050 NZD
Retailer 3$33,836 NZD
Retailer 4$42,767 NZD
Retailer 2$45,462 NZD

43 data points across 8 retailers

21 retailers$25,443 NZD to $42,767 NZD

B+
Cheapest Retailer
-
$25,443 NZD
$14,340 USD
B
Retailer 2
-
$26,654 NZD
$15,022 USD
View
B
Retailer 3
-
$26,760 NZD
$15,082 USD
View
B
Retailer 4
-
$27,292 NZD
CA$21,364 CAD
View
B
Retailer 5
-
$27,897 NZD
$15,723 USD
View
Final sale: no returns
B
Retailer 6
-
$28,504 NZD
$16,065 USD
View
B
Retailer 7
-
$29,109 NZD
$16,406 USD
View
B
Retailer 8
-
$30,050 NZD
£13,336 GBP
View
Retailer 9
-
$30,544 NZD
A$26,484 AUD
View
Price last confirmed 9 days ago
B
Retailer 10
-
$31,050 NZD
$17,500 USD
View
B
Retailer 11
-
$31,535 NZD
$17,773 USD
View
B
Retailer 12
-
$32,505 NZD
$18,320 USD
View
B
Retailer 13
-
$32,505 NZD
$18,320 USD
View
B
Retailer 14
-
$32,748 NZD
$18,457 USD
View
B
Retailer 15
-
$33,587 NZD
$18,930 USD
View
B
Retailer 16
-
$33,836 NZD
€18,162 EUR
View
B
Retailer 17
-
$33,845 NZD
$19,075 USD
View
B
Retailer 18
-
$41,238 NZD
$23,242 USD
View
B
Retailer 19
-
$42,767 NZD
ZAR 389,392 ZAR
View
Retailer 20
-
$45,462 NZD
£20,175 GBP
View
Price under review
Most Expensive
Diamond Quarter
1.51SI1D2126AC85N · Oct 29
$50,730 NZD
£22,513 GBP
View
Price under review
20 more retailers have this diamond
Prices start from $25,443 NZDSave up to $17,323 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+
1.51ct Round
$25,443 NZD