CaratHunter
Plans
Oval|Natural|GIA

1.51ct I SI2 Oval Natural Diamond

EX • I/SI2 • GIA 1555356497

Certificate GIA 1555356497

Diamond specifications and retailer prices

From £1,662 GBP
HK$17,400 HKD
As of October 31, 2026
Save £2,813 GBP (63%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £4,475 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1555356497. Listed at 12 retailers as of October 30, 2026, with prices from £1,662 to £4,475, a £2,813 spread on the same certified stone. NZ Jewellers lists it at £4,475. 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
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1555356497
Dimensions9.57 × 6.34 × 3.99 mm
L/W Ratio1.51
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
9.57 mm6.34 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1555356497
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.9%

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 31
Current: £4,475 GBP|Low: £1,643 GBP|High: £4,541 GBP|Avg: £2,433 GBP|-1.4%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 5£1,662 GBP
Retailer 2£1,699 GBP
Retailer 11£1,976 GBP
Retailer 7£2,094 GBP
Retailer 4£2,103 GBP
Retailer 9£2,140 GBP
Retailer 8£2,223 GBP
Retailer 12£2,305 GBP
Retailer 3£2,311 GBP
Retailer 6£2,470 GBP
Retailer 10£3,585 GBP
NZ Jewellers£4,475 GBP

35 data points across 12 retailers

12 retailers£1,662 GBP to £4,475 GBP

A
Cheapest Retailer
-
£1,662 GBP
HK$17,400 HKD
A
Retailer 2
-
£1,699 GBP
₹216,844 INR
View
A
Retailer 3
-
£1,976 GBP
$2,648 USD
View
Final sale: no returns
A
Retailer 4
-
£2,094 GBP
View
A
Retailer 5
-
£2,103 GBP
$2,818 USD
View
A
Retailer 6
-
£2,140 GBP
$2,868 USD
View
A
Retailer 7
-
£2,223 GBP
$2,979 USD
View
A
Retailer 8
-
£2,305 GBP
$3,089 USD
View
A
Retailer 9
-
£2,311 GBP
SGD 4,184 SGD
View
A
Retailer 10
-
£2,470 GBP
$3,309 USD
View
A
Retailer 11
-
£3,585 GBP
View
Most Expensive
B+
NZ Jewellers
df3f3558-a934-4f9b-8a24-f837e4552cf4 · Oct 30
£4,475 GBP
$5,996 USD
View
11 more retailers have this diamond
Prices start from £1,662 GBPSave up to £2,813 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
£1,662 GBP