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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 $5,813 AUD
HK$31,900 HKD
As of November 1, 2026
Save $7,268 AUD (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $13,081 AUD 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 $5,813 to $13,081, a $7,268 spread on the same certified stone. Queensmith lists it at $13,081. 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: $13,081 AUD|Low: $5,813 AUD|High: $13,126 AUD|Avg: $8,783 AUD|+2.0%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6$5,813 AUD
Retailer 2$6,173 AUD
Retailer 7$6,792 AUD
Retailer 8$7,146 AUD
Retailer 5$7,505 AUD
Retailer 4$8,725 AUD
Retailer 3$12,332 AUD
Queensmith$13,081 AUD

35 data points across 8 retailers

19 retailers$5,813 AUD to $13,081 AUD

A
Cheapest Retailer
-
$5,813 AUD
HK$31,900 HKD
A
Retailer 2
-
$6,173 AUD
₹412,987 INR
View
A
Retailer 3
-
$6,792 AUD
SGD 6,447 SGD
View
A
Retailer 4
-
$7,061 AUD
$4,960 USD
View
A
Retailer 5
-
$7,146 AUD
$5,020 USD
View
Final sale: no returns
A
Retailer 6
-
$7,382 AUD
SGD 7,007 SGD
View
A
Retailer 7
-
$7,419 AUD
View
A
Retailer 8
-
$7,505 AUD
£4,151 GBP
View
B+
Retailer 9
-
$7,659 AUD
$5,380 USD
View
Retailer 10
-
$7,743 AUD
$5,439 USD
View
Price last confirmed 24 days ago
Retailer 11
-
$7,743 AUD
$5,439 USD
View
Price last confirmed 24 days ago
Retailer 12
-
$7,743 AUD
$5,439 USD
View
Price last confirmed 33 days ago
Retailer 13
-
$7,743 AUD
$5,439 USD
View
Price last confirmed 33 days ago
B+
Retailer 14
-
$7,961 AUD
$5,592 USD
View
B+
Retailer 15
-
$8,725 AUD
€5,837 EUR
View
Retailer 16
-
$8,933 AUD
$6,275 USD
View
Price last confirmed 33 days ago
B
Retailer 17
-
$12,332 AUD
£6,821 GBP
View
Retailer 18
-
$12,950 AUD
$9,097 USD
View
Price last confirmed 34 days ago
Most Expensive
B
Queensmith
2557742093 · Oct 28
$13,081 AUD
£7,235 GBP
View
18 more retailers have this diamond
Prices start from $5,813 AUDSave up to $7,268 AUD

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
$5,813 AUD