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Oval|Natural|GIA

1.50ct H SI1 Oval Natural Diamond

EX • H/SI1 • GIA 1555376298

Certificate GIA 1555376298

Diamond specifications and retailer prices

From £3,384 GBP
As of November 3, 2026
Save £3,685 GBP (52%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £8,113 GBP at NZ Jewellers · As of September 19, 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 H 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 1555376298. Listed at 20 retailers as of November 2, 2026, with a 109% 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

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

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1555376298
Dimensions8.64 × 6.26 × 3.97 mm
L/W Ratio1.38
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Cloud, Feather, Crystal, Indented Natural, Needle
Top View
8.64 mm6.26 mm1.50 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555376298
Side View
Table 60.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.4%

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: Nov 3
Current: £4,557 GBP|Low: £3,384 GBP|High: £7,233 GBP|Avg: £4,662 GBP|-3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
November 4, 2026
Retailer 4£3,384 GBP
Retailer 5£3,632 GBP
Retailer 2£3,855 GBP
Retailer 10£4,012 GBP
Retailer 16£4,057 GBP
Retailer 15£4,290 GBP
Retailer 14£4,332 GBP
Retailer 12£4,521 GBP
Retailer 1£4,557 GBP
Retailer 7£4,602 GBP
Retailer 9£4,722 GBP
Retailer 8£4,795 GBP
Retailer 3£4,914 GBP
Retailer 6£5,379 GBP
Retailer 13£5,895 GBP
Retailer 11£7,068 GBP

27 data points across 16 retailers

20 retailers£3,384 GBP to £7,068 GBP

A
Cheapest Retailer
-
£3,384 GBP
A
Retailer 2
-
£3,632 GBP
View
A
Retailer 3
-
£3,855 GBP
View
B+
Retailer 4
-
£4,012 GBP
View
Final sale: no returns
B+
Retailer 5
-
£4,057 GBP
View
B+
Retailer 6
-
£4,290 GBP
View
B+
Retailer 7
-
£4,332 GBP
View
Retailer 8
-
£4,395 GBP
View
Price last confirmed 48 days ago
B+
Retailer 9
-
£4,521 GBP
View
B+
Retailer 10
-
£4,557 GBP
View
B+
Retailer 11
-
£4,578 GBP
View
Retailer 12
-
£4,602 GBP
View
Price last confirmed 22 days ago
B+
Retailer 13
-
£4,722 GBP
View
Retailer 14
-
£4,795 GBP
View
Price last confirmed 28 days ago
B+
Retailer 15
-
£4,914 GBP
View
Retailer 16
-
£5,071 GBP
View
Price last confirmed 48 days ago
B+
Retailer 17
-
£5,379 GBP
View
B+
Retailer 18
-
£5,895 GBP
View
B
Retailer 19
-
£7,068 GBP
View
Most Expensive
NZ Jewellers
066f5159-0628-47f0-b3b5-85d10d42868f · Sep 19
£8,113 GBP
$10,859 USD
View
Price last confirmed 47 days ago
19 more retailers have this diamond
Prices start from £3,384 GBPSave up to £3,685 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
£3,384 GBP