Oval|Natural|GIA

1.50ct I SI1 Oval Natural Diamond

EX • I/SI1 • GIA 2557796851

Certificate GIA 2557796851

Diamond specifications and retailer prices

From £2,684 GBP
HK$28,100 HKD
As of October 31, 2026
Save £3,691 GBP (58%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £6,376 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.5ct natural oval diamond

This 1.5ct 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 2557796851. Listed at 10 retailers as of October 30, 2026, with prices from £2,684 to £6,376, a £3,691 spread on the same certified stone. NZ Jewellers lists it at £6,376. 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

1.50
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Pavilion angle35.73°
OriginNatural
Grading LabGIA
CertificateGIA 2557796851
Dimensions8.80 × 6.25 × 4.03 mm
L/W Ratio1.41
Key to symbols
Crystal, Feather, Needle
Top View
8.80 mm6.25 mm1.50 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557796851
Side View
Table 56.0%CrownGirdle: STK-THKPavilion 35.73°Culet: NoneDepth 64.4%

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: £6,376 GBP|Low: £2,665 GBP|High: £6,682 GBP|Avg: £4,135 GBP|-4.6%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 3£2,684 GBP
Retailer 5£3,100 GBP
Retailer 2£3,225 GBP
Retailer 9£3,416 GBP
Retailer 7£3,660 GBP
Retailer 8£3,660 GBP
Retailer 10£3,894 GBP
Retailer 4£4,156 GBP
Retailer 6£5,860 GBP
NZ Jewellers£6,376 GBP

40 data points across 10 retailers

10 retailers£2,684 GBP to £6,376 GBP

A
Cheapest Retailer
-
£2,684 GBP
HK$28,100 HKD
A
Retailer 2
-
£3,100 GBP
€3,955 EUR
View
A
Retailer 3
-
£3,225 GBP
$4,321 USD
View
A
Retailer 4
-
£3,416 GBP
SGD 6,185 SGD
View
A
Retailer 5
-
£3,660 GBP
$4,904 USD
View
A
Retailer 6
-
£3,660 GBP
$4,904 USD
View
B+
Retailer 7
-
£3,894 GBP
A$8,028 AUD
View
B+
Retailer 8
-
£4,156 GBP
€5,304 EUR
View
B+
Retailer 9
-
£5,860 GBP
View
Most Expensive
B
NZ Jewellers
565532c0-953b-4f2d-aed4-fc30a2b45f0d · Oct 30
£6,376 GBP
$8,543 USD
View
9 more retailers have this diamond
Prices start from £2,684 GBPSave up to £3,691 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
1.50ct Oval
£2,684 GBP