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Oval|Natural|GIA

1.50ct D SI1 Oval Natural Diamond

EX • D/SI1 • GIA 6521686653

Certificate GIA 6521686653

Diamond specifications and retailer prices

From £5,081 GBP
As of October 31, 2026
Save £6,829 GBP (57%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £11,910 GBP at Adiamor · As of October 30, 2026
View at Adiamor

About this 1.5ct natural oval diamond

This 1.5ct natural oval sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6521686653. Listed at 22 retailers as of October 30, 2026, with prices from £5,081 to £11,910, a £6,829 spread on the same certified stone. Adiamor lists it at £11,910. 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
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6521686653
Dimensions8.71 × 6.36 × 4.04 mm
L/W Ratio1.37
Top View
8.71 mm6.36 mm1.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6521686653
Side View
Table 60.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 63.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £6,486 GBP|Low: £5,068 GBP|High: £7,157 GBP|Avg: £6,052 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 4£5,081 GBP
Retailer 13£5,087 GBP
Retailer 7£5,366 GBP
Retailer 12£5,372 GBP
Retailer 14£5,458 GBP
Retailer 10£5,809 GBP
Retailer 3£5,813 GBP
Retailer 1£6,486 GBP
Retailer 5£6,570 GBP
Retailer 2£6,637 GBP
Retailer 15£6,908 GBP
Retailer 6£6,923 GBP
Retailer 8£6,926 GBP
Retailer 11£6,926 GBP
Retailer 9£7,157 GBP

33 data points across 15 retailers

22 retailers£5,081 GBP to £11,910 GBP

A
Cheapest Retailer
-
£5,081 GBP
A
Retailer 2
-
£5,087 GBP
View
A
Retailer 3
-
£5,366 GBP
View
Final sale: no returns
A
Retailer 4
-
£5,372 GBP
View
A
Retailer 5
-
£5,458 GBP
View
Retailer 6
-
£5,592 GBP
View
Price last confirmed 25 days ago
B+
Retailer 7
-
£5,809 GBP
View
A
Retailer 8
-
£5,813 GBP
View
Retailer 9
-
£6,434 GBP
View
Price last confirmed 8 days ago
B+
Retailer 10
-
£6,486 GBP
View
Retailer 11
-
£6,570 GBP
View
Price last confirmed 14 days ago
B+
Retailer 12
-
£6,637 GBP
View
B+
Retailer 13
-
£6,908 GBP
View
B+
Retailer 14
-
£6,926 GBP
View
B+
Retailer 15
-
£6,926 GBP
View
Retailer 16
-
£6,971 GBP
View
Price last confirmed 8 days ago
Retailer 17
-
£7,077 GBP
View
Price last confirmed 8 days ago
B+
Retailer 18
-
£7,157 GBP
View
B+
Retailer 19
-
£7,160 GBP
View
B+
Retailer 20
-
£8,043 GBP
View
Retailer 21
-
£11,659 GBP
View
Price last confirmed 7 days ago
Most Expensive
B
Adiamor
D-69057583 · Oct 30
£11,910 GBP
$15,942 USD
View
21 more retailers have this diamond
Prices start from £5,081 GBPSave up to £6,829 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
£5,081 GBP