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Oval|Natural|GIA

0.90ct K SI1 Oval Natural Diamond

EX • K/SI1 • GIA 2556659597

Certificate GIA 2556659597

Diamond specifications and retailer prices

From £449 GBP
As of November 6, 2026
Save £1,496 GBP (77%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £2,006 GBP at NZ Jewellers · As of October 14, 2026
View at NZ Jewellers

About this 0.9ct natural oval diamond

This 0.9ct natural oval sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2556659597. Listed at 20 retailers as of November 2, 2026, with a 333% 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

0.90
Carat
K
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2556659597
Dimensions7.37 × 5.52 × 3.37 mm
L/W Ratio1.34
Top View
7.37 mm5.52 mm0.90 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2556659597
Side View
Table 55.0%CrownGirdle: STK-VTKPavilionCulet: NoneDepth 60.9%

Caratlytics Score

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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: Nov 6
Current: £1,945 GBP|Low: £449 GBP|High: £2,006 GBP|Avg: £837 GBP|-3.0%
NZ Jewellers
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
Retailer 17
Retailer 18
November 5, 2026
Retailer 13£449 GBP
Retailer 2£598 GBP
Retailer 11£610 GBP
Retailer 4£620 GBP
Retailer 6£620 GBP
Retailer 5£644 GBP
Retailer 10£663 GBP
Retailer 8£676 GBP
Retailer 14£693 GBP
Retailer 9£700 GBP
Retailer 7£704 GBP
Retailer 16£716 GBP
Retailer 3£719 GBP
Retailer 17£876 GBP
Retailer 18£908 GBP
Retailer 15£1,099 GBP
Retailer 12£1,154 GBP
NZ Jewellers£1,945 GBP

27 data points across 18 retailers

20 retailers£449 GBP to £1,945 GBP

A
Cheapest Retailer
-
£449 GBP
A
Retailer 2
-
£598 GBP
View
A
Retailer 3
-
£610 GBP
View
Retailer 4
-
£620 GBP
View
Price last confirmed 8 days ago
A
Retailer 5
-
£620 GBP
View
Retailer 6
-
£640 GBP
View
Price last confirmed 23 days ago
A
Retailer 7
-
£644 GBP
View
Retailer 8
-
£663 GBP
View
Price last confirmed 10 days ago
A
Retailer 9
-
£676 GBP
View
A
Retailer 10
-
£693 GBP
View
A
Retailer 11
-
£700 GBP
View
A
Retailer 12
-
£704 GBP
View
A
Retailer 13
-
£716 GBP
View
A
Retailer 14
-
£719 GBP
View
B+
Retailer 15
-
£876 GBP
View
B+
Retailer 16
-
£908 GBP
View
B+
Retailer 17
-
£1,099 GBP
View
B+
Retailer 18
-
£1,154 GBP
View
B
Retailer 19
-
£1,945 GBP
View
Most Expensive
NZ Jewellers
d30260a8-da44-4d58-bc63-da6f6745199f · Oct 14
£2,006 GBP
$2,685 USD
View
Price last confirmed 23 days ago
19 more retailers have this diamond
Prices start from £449 GBPSave up to £1,496 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
0.90ct Oval
£449 GBP