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Oval|Natural|GIA

1.51ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2566156295

Certificate GIA 2566156295

Diamond specifications and retailer prices

From £3,156 GBP
As of November 5, 2026
Save £2,558 GBP (45%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £5,714 GBP at Wholesale Diamonds Direct · As of November 6, 2026
View at Wholesale Diamonds Direct

About this 1.51ct natural oval diamond

This 1.51ct natural oval 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 stated by the retailer rather than the lab and certified by GIA 2566156295. Listed at 13 retailers as of November 5, 2026, with prices from £3,156 to £5,714, a £2,558 spread on the same certified stone. Wholesale Diamonds Direct lists it at £5,714. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle40.24°
Pavilion angle39.43°
OriginNatural
Grading LabGIA
CertificateGIA 2566156295
Dimensions8.95 × 6.42 × 3.96 mm
L/W Ratio1.39
Culet sizeNone
Top View
8.95 mm6.42 mm1.51 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2566156295
Side View
Table 60.0%Crown 40.24°Girdle: MED-THKPavilion 39.43°Culet: NoneDepth 61.7%

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: Nov 5
Current: £4,037 GBP|Low: £3,156 GBP|High: £6,393 GBP|Avg: £4,039 GBP|-8.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Wholesale Diamonds Direct
November 6, 2026
Retailer 10£3,156 GBP
Retailer 7£3,245 GBP
Retailer 6£3,276 GBP
Retailer 8£3,332 GBP
Retailer 3£3,388 GBP
Retailer 4£3,400 GBP
Retailer 2£3,420 GBP
Retailer 5£3,510 GBP
Retailer 11£3,943 GBP
Retailer 12£3,952 GBP
Retailer 1£4,037 GBP
Retailer 9£5,286 GBP
Wholesale Diamonds Direct£5,714 GBP

33 data points across 13 retailers

13 retailers£3,156 GBP to £5,714 GBP

A
Cheapest Retailer
-
£3,156 GBP
A
Retailer 2
-
£3,245 GBP
View
A
Retailer 3
-
£3,276 GBP
View
A
Retailer 4
-
£3,332 GBP
View
A
Retailer 5
-
£3,388 GBP
View
A
Retailer 6
-
£3,400 GBP
View
A
Retailer 7
-
£3,420 GBP
View
A
Retailer 8
-
£3,510 GBP
View
A
Retailer 9
-
£3,943 GBP
View
A
Retailer 10
-
£3,952 GBP
View
A
Retailer 11
-
£4,037 GBP
View
B+
Retailer 12
-
£5,286 GBP
View
Most Expensive
B+
Wholesale Diamonds Direct
579393277 · Nov 6
£5,714 GBP
$7,648 USD
View
12 more retailers have this diamond
Prices start from £3,156 GBPSave up to £2,558 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 Oval
£3,156 GBP