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Round|Natural|GIA

1.51ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2567103225

Certificate GIA 2567103225

Diamond specifications and retailer prices

From £3,000 GBP
HK$31,400 HKD
As of October 28, 2026
Save £3,608 GBP (55%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £7,130 GBP at NZ Jewellers · As of October 14, 2026
View at NZ Jewellers

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 2567103225. Listed at 11 retailers as of October 28, 2026, with a 120% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
FluorescenceFaint
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2567103225
Dimensions7.24 × 7.30 × 4.56 mm
L/W Ratio1.01
Key to symbols
Crystal, Feather, Needle
Top View
7.24 mm7.30 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2567103225
Side View
Table 57.0%CrownGirdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.7%

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 28
Current: £7,130 GBP|Low: £3,000 GBP|High: £7,283 GBP|Avg: £4,542 GBP|-2.1%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 5£3,000 GBP
Retailer 6£3,452 GBP
Retailer 10£3,617 GBP
Retailer 9£3,853 GBP
Retailer 3£4,263 GBP
Retailer 11£4,263 GBP
Retailer 2£4,269 GBP
Retailer 8£4,356 GBP
Retailer 7£4,631 GBP
Retailer 4£6,607 GBP
NZ Jewellers£7,130 GBP

29 data points across 11 retailers

11 retailers£3,000 GBP to £6,607 GBP

A
Cheapest Retailer
-
£3,000 GBP
HK$31,400 HKD
Retailer 2
-
£3,452 GBP
€4,405 EUR
View
Price last confirmed 4 days ago
A
Retailer 3
-
£3,617 GBP
$4,846 USD
View
A
Retailer 4
-
£3,853 GBP
SGD 6,977 SGD
View
Retailer 5
-
£4,263 GBP
$5,712 USD
View
Price last confirmed 18 days ago
Retailer 6
-
£4,263 GBP
$5,712 USD
View
Price last confirmed 17 days ago
B+
Retailer 7
-
£4,269 GBP
View
B+
Retailer 8
-
£4,356 GBP
$5,836 USD
View
B+
Retailer 9
-
£4,631 GBP
€5,910 EUR
View
B
Retailer 10
-
£6,607 GBP
View
Most Expensive
NZ Jewellers
4999cb3f-c561-4b78-81e9-38bc7486ca1c · Oct 14
£7,130 GBP
$9,554 USD
View
Price last confirmed 18 days ago
10 more retailers have this diamond
Prices start from £3,000 GBPSave up to £3,608 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
£3,000 GBP