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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 3555438928

Certificate GIA 3555438928

Diamond specifications and retailer prices

From $9,450 NZD
$5,317 USD
As of November 1, 2026
Save $8,677 NZD (48%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: $18,127 NZD at MOH London · As of November 2, 2026
View at MOH London

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 3555438928. Listed at 18 retailers as of November 1, 2026, with prices from $9,450 to $18,127, a $8,677 spread on the same certified stone. MOH London lists it at $18,127. 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 3555438928
Dimensions7.30 × 7.34 × 4.58 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.30 mm7.34 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3555438928
Side View
Table 58.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 62.5%

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: $18,127 NZD|Low: $9,323 NZD|High: $18,346 NZD|Avg: $11,848 NZD|-1.2%
MOH London
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
Retailer 17
Retailer 18
Retailer 19
November 2, 2026
Retailer 11$9,323 NZD
Retailer 19$9,450 NZD
Retailer 5$9,722 NZD
Retailer 17$9,730 NZD
Retailer 3$9,851 NZD
Retailer 6$10,289 NZD
Retailer 18$10,371 NZD
Retailer 10$10,961 NZD
Retailer 4$10,983 NZD
Retailer 12$11,147 NZD
Retailer 8$11,329 NZD
Retailer 2$11,350 NZD
Retailer 9$11,645 NZD
Retailer 14$11,721 NZD
Retailer 7$12,591 NZD
Retailer 13$12,654 NZD
Retailer 15$13,095 NZD
Retailer 16$15,117 NZD
MOH London$18,127 NZD

25 data points across 19 retailers

18 retailers$9,450 NZD to $18,127 NZD

A
Cheapest Retailer
-
$9,450 NZD
$5,317 USD
A
Retailer 2
-
$9,722 NZD
$5,470 USD
View
A
Retailer 3
-
$9,730 NZD
$5,474 USD
View
A
Retailer 4
-
$9,851 NZD
$5,542 USD
View
B+
Retailer 5
-
$10,289 NZD
$5,789 USD
View
Final sale: no returns
B+
Retailer 6
-
$10,371 NZD
$5,835 USD
View
B+
Retailer 7
-
$10,983 NZD
$6,180 USD
View
B+
Retailer 8
-
$11,147 NZD
$6,272 USD
View
Retailer 9
-
$11,329 NZD
$6,374 USD
View
Price last confirmed 18 days ago
B+
Retailer 10
-
$11,350 NZD
$6,386 USD
View
Retailer 11
-
$11,645 NZD
A$10,080 AUD
View
Price last confirmed 29 days ago
B+
Retailer 12
-
$11,721 NZD
£5,193 GBP
View
Retailer 13
-
$11,874 NZD
$6,681 USD
View
Price last confirmed 26 days ago
B+
Retailer 14
-
$12,591 NZD
$7,084 USD
View
B+
Retailer 15
-
$12,654 NZD
£5,606 GBP
View
B+
Retailer 16
-
$13,095 NZD
€7,017 EUR
View
B
Retailer 17
-
$15,117 NZD
ZAR 137,409 ZAR
View
Most Expensive
B
MOH London
BCCCD8CA4 · Nov 2
$18,127 NZD
£8,031 GBP
View
17 more retailers have this diamond
Prices start from $9,450 NZDSave up to $8,677 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
$9,450 NZD