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Round|Natural|GIA

1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2557742093

Certificate GIA 2557742093

Diamond specifications and retailer prices

From $7,245 NZD
HK$31,900 HKD
As of November 1, 2026
Save $9,058 NZD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $16,303 NZD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2557742093. Listed at 19 retailers as of October 28, 2026, with prices from $7,245 to $16,303, a $9,058 spread on the same certified stone. Queensmith lists it at $16,303. 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
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2557742093
Dimensions7.28 × 7.34 × 4.57 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Crystal, Feather
Top View
7.28 mm7.34 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557742093
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: 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: $16,303 NZD|Low: $7,245 NZD|High: $16,359 NZD|Avg: $10,910 NZD|+2.4%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 2, 2026
Retailer 6$7,245 NZD
Retailer 3$7,694 NZD
Retailer 7$8,465 NZD
Retailer 8$8,907 NZD
Retailer 2$9,354 NZD
Retailer 5$10,874 NZD
Retailer 4$15,370 NZD
Queensmith$16,303 NZD

35 data points across 8 retailers

19 retailers$7,245 NZD to $16,303 NZD

A
Cheapest Retailer
-
$7,245 NZD
HK$31,900 HKD
A
Retailer 2
-
$7,694 NZD
₹412,987 INR
View
A
Retailer 3
-
$8,465 NZD
SGD 6,447 SGD
View
A
Retailer 4
-
$8,801 NZD
$4,960 USD
View
A
Retailer 5
-
$8,907 NZD
$5,020 USD
View
Final sale: no returns
A
Retailer 6
-
$9,200 NZD
SGD 7,007 SGD
View
A
Retailer 7
-
$9,247 NZD
A$8,018 AUD
View
A
Retailer 8
-
$9,354 NZD
£4,151 GBP
View
B+
Retailer 9
-
$9,546 NZD
$5,380 USD
View
Retailer 10
-
$9,650 NZD
$5,439 USD
View
Price last confirmed 25 days ago
Retailer 11
-
$9,650 NZD
$5,439 USD
View
Price last confirmed 25 days ago
Retailer 12
-
$9,650 NZD
$5,439 USD
View
Price last confirmed 34 days ago
Retailer 13
-
$9,650 NZD
$5,439 USD
View
Price last confirmed 33 days ago
B+
Retailer 14
-
$9,923 NZD
$5,592 USD
View
B+
Retailer 15
-
$10,874 NZD
€5,837 EUR
View
Retailer 16
-
$11,134 NZD
$6,275 USD
View
Price last confirmed 33 days ago
B
Retailer 17
-
$15,370 NZD
£6,821 GBP
View
Retailer 18
-
$16,141 NZD
$9,097 USD
View
Price last confirmed 35 days ago
Most Expensive
B
Queensmith
2557742093 · Oct 28
$16,303 NZD
£7,235 GBP
View
18 more retailers have this diamond
Prices start from $7,245 NZDSave up to $9,058 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
$7,245 NZD