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1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2557742093

Certificate GIA 2557742093

Diamond specifications and retailer prices

From £3,047 GBP
HK$31,900 HKD
As of November 1, 2026
Save £3,810 GBP (56%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £6,858 GBP 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 £3,047 to £6,858, a £3,810 spread on the same certified stone. Queensmith lists it at £6,858. 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: £6,858 GBP|Low: £3,047 GBP|High: £6,881 GBP|Avg: £4,605 GBP|+2.0%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 6£3,047 GBP
Retailer 2£3,236 GBP
Retailer 7£3,561 GBP
Retailer 8£3,747 GBP
Retailer 5£3,935 GBP
Retailer 4£4,574 GBP
Retailer 3£6,465 GBP
Queensmith£6,858 GBP

35 data points across 8 retailers

19 retailers£3,047 GBP to £6,858 GBP

A
Cheapest Retailer
-
£3,047 GBP
HK$31,900 HKD
A
Retailer 2
-
£3,236 GBP
₹412,987 INR
View
A
Retailer 3
-
£3,561 GBP
SGD 6,447 SGD
View
A
Retailer 4
-
£3,702 GBP
$4,960 USD
View
A
Retailer 5
-
£3,747 GBP
$5,020 USD
View
Final sale: no returns
A
Retailer 6
-
£3,870 GBP
SGD 7,007 SGD
View
A
Retailer 7
-
£3,890 GBP
A$8,018 AUD
View
A
Retailer 8
-
£3,935 GBP
View
B+
Retailer 9
-
£4,015 GBP
$5,380 USD
View
Retailer 10
-
£4,059 GBP
$5,439 USD
View
Price last confirmed 24 days ago
Retailer 11
-
£4,059 GBP
$5,439 USD
View
Price last confirmed 24 days ago
Retailer 12
-
£4,059 GBP
$5,439 USD
View
Price last confirmed 33 days ago
Retailer 13
-
£4,059 GBP
$5,439 USD
View
Price last confirmed 32 days ago
B+
Retailer 14
-
£4,174 GBP
$5,592 USD
View
B+
Retailer 15
-
£4,574 GBP
€5,837 EUR
View
Retailer 16
-
£4,683 GBP
$6,275 USD
View
Price last confirmed 32 days ago
B
Retailer 17
-
£6,465 GBP
View
Retailer 18
-
£6,789 GBP
$9,097 USD
View
Price last confirmed 34 days ago
Most Expensive
B
Queensmith
2557742093 · Oct 28
£6,858 GBP
View
18 more retailers have this diamond
Prices start from £3,047 GBPSave up to £3,810 GBP

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
£3,047 GBP