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Round|Natural|GIA

0.85ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6511247641

Shape and cutting style on the report: Round brilliant

Certificate GIA 6511247641

Diamond specifications and retailer prices

From £792 GBP
As of November 5, 2026
Save £467 GBP (37%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,230 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.85ct natural round diamond

This 0.85ct natural round sits in the just-under-one-carat band, graded K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6511247641. Listed at 8 retailers as of November 2, 2026, with a 59% 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

0.85
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6511247641
Dimensions6.05 × 6.01 × 3.76 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.05 mm6.01 mm0.85 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6511247641
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.3%

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: £961 GBP|Low: £785 GBP|High: £1,318 GBP|Avg: £1,026 GBP|+9.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 5, 2026
Retailer 2£792 GBP
Retailer 1£961 GBP
Retailer 4£1,025 GBP
Retailer 3£1,259 GBP

41 data points across 4 retailers

8 retailers£792 GBP to £1,259 GBP

Retailer 1
-
£711 GBP
Price last confirmed 29 days ago
Retailer 2
-
£711 GBP
View
Price last confirmed 29 days ago
Retailer 3
-
£739 GBP
View
Price last confirmed 38 days ago
A
Retailer 4
-
£792 GBP
View
Retailer 5
-
£821 GBP
View
Price last confirmed 38 days ago
B+
Retailer 6
-
£961 GBP
View
B
Retailer 7
-
£1,259 GBP
View
Most Expensive
NZ Jewellers
343ac026-1a00-45eb-882b-539f5026d87e · Sep 28
£2,230 GBP
$3,002 USD
View
Price last confirmed 39 days ago
7 more retailers have this diamond
Prices start from £792 GBPSave up to £467 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
0.85ct Round
£792 GBP