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Round|Natural|GIA

0.86ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6521840901

Certificate GIA 6521840901

Diamond specifications and retailer prices

From £609 GBP
As of November 4, 2026
Save £772 GBP (56%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,346 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 0.86ct natural round diamond

This 0.86ct 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 6521840901. Listed at 9 retailers as of November 4, 2026, with a 127% 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

0.86
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6521840901
Dimensions6.07 × 6.05 × 3.79 mm
L/W Ratio1.00
Star length50%
Top View
6.07 mm6.05 mm0.86 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 6521840901
Side View
Table 57.0%Crown 36°Girdle: ThickPavilion 41°Culet: NoneDepth 62.6%

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 4
Current: £996 GBP|Low: £609 GBP|High: £1,389 GBP|Avg: £914 GBP|-0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 4£609 GBP
Retailer 6£650 GBP
Retailer 5£678 GBP
Retailer 1£996 GBP
Retailer 2£1,054 GBP
Retailer 7£1,058 GBP
Retailer 3£1,381 GBP

35 data points across 7 retailers

9 retailers£609 GBP to £1,381 GBP

A
Cheapest Retailer
-
£609 GBP
A
Retailer 2
-
£650 GBP
View
Retailer 3
-
£678 GBP
View
Price last confirmed 28 days ago
Retailer 4
-
£704 GBP
View
Price last confirmed 38 days ago
Retailer 5
-
£782 GBP
View
Price last confirmed 28 days ago
B+
Retailer 6
-
£996 GBP
View
B+
Retailer 7
-
£1,054 GBP
View
B
Retailer 8
-
£1,381 GBP
View
Most Expensive
NZ Jewellers
00154141-d021-4db4-8d6e-f4477753c3a0 · Sep 28
£2,346 GBP
$3,157 USD
View
Price last confirmed 39 days ago
8 more retailers have this diamond
Prices start from £609 GBPSave up to £772 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
0.86ct Round
£609 GBP