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Round|Natural|GIA

0.90ct M SI2 Round Natural Diamond

EX • M/SI2 • GIA 6531320919

Certificate GIA 6531320919

Diamond specifications and retailer prices

From £425 GBP
As of November 5, 2026
Save £322 GBP (43%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,865 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.9ct natural round diamond

This 0.9ct natural round sits in the just-under-one-carat band, graded M colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6531320919. Listed at 10 retailers as of November 5, 2026, with a 76% 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
M
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 6531320919
Dimensions6.17 × 6.13 × 3.88 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Twinning Wisp
Top View
6.17 mm6.13 mm0.90 ctM / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6531320919
Side View
Table 57.0%Crown 34°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 63.1%

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 5
Current: £747 GBP|Low: £425 GBP|High: £831 GBP|Avg: £600 GBP|-2.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 2£425 GBP
Retailer 5£428 GBP
Retailer 6£567 GBP
Retailer 7£589 GBP
Retailer 3£656 GBP
Retailer 4£675 GBP
Retailer 1£747 GBP

45 data points across 7 retailers

10 retailers£425 GBP to £747 GBP

A
Cheapest Retailer
-
£425 GBP
A
Retailer 2
-
£428 GBP
View
A
Retailer 3
-
£567 GBP
View
Retailer 4
-
£589 GBP
View
Price last confirmed 36 days ago
Retailer 5
-
£611 GBP
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£656 GBP
View
B+
Retailer 7
-
£675 GBP
View
Retailer 8
-
£680 GBP
View
Price last confirmed 38 days ago
B+
Retailer 9
-
£747 GBP
View
Most Expensive
NZ Jewellers
4f23c682-be77-4c26-9618-264522191a6c · Sep 28
£1,865 GBP
$2,510 USD
View
Price last confirmed 39 days ago
9 more retailers have this diamond
Prices start from £425 GBPSave up to £322 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 Round
£425 GBP