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Round|Natural|GIA

0.81ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 3425192437

Certificate GIA 3425192437

Diamond specifications and retailer prices

From £450 GBP
As of November 5, 2026
Save £1,413 GBP (76%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £1,863 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 0.81ct natural round diamond

This 0.81ct 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 3425192437. Listed at 19 retailers as of November 5, 2026, with prices from £450 to £1,863, a £1,413 spread on the same certified stone. NZ Jewellers lists it at £1,863. 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

0.81
Carat
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 3425192437
Dimensions6.01 × 5.99 × 3.68 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.01 mm5.99 mm0.81 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 3425192437
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.3%

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: Nov 5
Current: £1,863 GBP|Low: £450 GBP|High: £1,900 GBP|Avg: £742 GBP|-2.0%
NZ Jewellers
Retailer 2
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Retailer 8
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Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
Retailer 18
November 6, 2026
Retailer 15£450 GBP
Retailer 10£456 GBP
Retailer 8£585 GBP
Retailer 3£594 GBP
Retailer 16£603 GBP
Retailer 9£607 GBP
Retailer 5£617 GBP
Retailer 18£618 GBP
Retailer 11£633 GBP
Retailer 4£685 GBP
Retailer 17£692 GBP
Retailer 12£699 GBP
Retailer 7£706 GBP
Retailer 14£712 GBP
Retailer 2£784 GBP
Retailer 13£790 GBP
Retailer 6£1,091 GBP
NZ Jewellers£1,863 GBP

16 data points across 18 retailers

19 retailers£450 GBP to £1,863 GBP

A
Cheapest Retailer
-
£450 GBP
A
Retailer 2
-
£456 GBP
View
A
Retailer 3
-
£585 GBP
View
A
Retailer 4
-
£594 GBP
View
A
Retailer 5
-
£603 GBP
View
Retailer 6
-
£607 GBP
View
Price last confirmed 8 days ago
A
Retailer 7
-
£617 GBP
View
A
Retailer 8
-
£618 GBP
View
A
Retailer 9
-
£633 GBP
View
Retailer 10
-
£672 GBP
View
Price last confirmed 30 days ago
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Retailer 11
-
£685 GBP
View
A
Retailer 12
-
£692 GBP
View
A
Retailer 13
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£699 GBP
View
A
Retailer 14
-
£706 GBP
View
A
Retailer 15
-
£712 GBP
View
A
Retailer 16
-
£784 GBP
View
B+
Retailer 17
-
£790 GBP
View
B
Retailer 18
-
£1,091 GBP
View
Most Expensive
B
NZ Jewellers
e5fc6c79-4b1a-4ec2-b2f7-f794fd5eedf2 · Nov 5
£1,863 GBP
$2,507 USD
View
18 more retailers have this diamond
Prices start from £450 GBPSave up to £1,413 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
0.81ct Round
£450 GBP