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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 $4,045 USD
HK$31,600 HKD
As of October 29, 2026
Save $5,144 USD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $9,188 USD 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 $4,045 to $9,188, a $5,144 spread on the same certified stone. Queensmith lists it at $9,188. 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
Color
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: Oct 29
Current: $9,188 USD|Low: $4,326 USD|High: $9,220 USD|Avg: $6,298 USD|+2.4%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 29, 2026
Retailer 2$4,356 USD
Retailer 6$4,771 USD
Retailer 7$5,020 USD
Retailer 4$5,240 USD
Retailer 5$6,123 USD
Retailer 3$8,708 USD
Queensmith$9,188 USD

34 data points across 7 retailers

19 retailers$4,045 USD to $9,188 USD

A
Cheapest Retailer
-
$4,045 USD
HK$31,600 HKD
A
Retailer 2
-
$4,356 USD
₹414,830 INR
View
A
Retailer 3
-
$4,771 USD
SGD 6,447 SGD
View
A
Retailer 4
-
$4,960 USD
View
A
Retailer 5
-
$5,020 USD
View
Final sale: no returns
A
Retailer 6
-
$5,185 USD
SGD 7,007 SGD
View
A
Retailer 7
-
$5,212 USD
A$8,018 AUD
View
A
Retailer 8
-
$5,240 USD
£4,126 GBP
View
B+
Retailer 9
-
$5,380 USD
View
B+
Retailer 10
-
$5,439 USD
View
Price last confirmed 21 days ago
B+
Retailer 11
-
$5,439 USD
View
Price last confirmed 21 days ago
B+
Retailer 12
-
$5,439 USD
View
Price last confirmed 30 days ago
B+
Retailer 13
-
$5,439 USD
View
Price last confirmed 29 days ago
B+
Retailer 14
-
$5,592 USD
View
B+
Retailer 15
-
$6,123 USD
€5,831 EUR
View
B+
Retailer 16
-
$6,275 USD
View
Price last confirmed 29 days ago
B
Retailer 17
-
$8,708 USD
£6,857 GBP
View
B
Retailer 18
-
$9,097 USD
View
Price last confirmed 31 days ago
Most Expensive
B
Queensmith
2557742093 · Oct 28
$9,188 USD
£7,235 GBP
View
18 more retailers have this diamond
Prices start from $4,045 USDSave up to $5,144 USD

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
$4,045 USD