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Round|Natural|GIA

2.66ct H SI1 Round Natural Diamond

EX • H/SI1

Diamond specifications and retailer prices

From £15,262 GBP
$20,481 USD
As of November 2, 2026
Save £9,062 GBP (37%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £24,324 GBP at NZ Jewellers · As of November 2, 2026
View at NZ Jewellers

About this 2.66ct natural round diamond

This 2.66ct natural round sits in the two to three carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 13 retailers as of November 2, 2026, with prices from £15,262 to £24,324, a £9,062 spread on the same certified stone. NZ Jewellers lists it at £24,324. 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

2.66
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions9.01 × 9.07 × 5.41 mm
L/W Ratio1.01
Top View
9.01 mm9.07 mm2.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 59.0%CrownGirdle: ThinPavilionCulet: NoneDepth 59.8%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: £24,324 GBP|Low: £15,112 GBP|High: £24,324 GBP|Avg: £18,576 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 9£15,262 GBP
Retailer 3£16,630 GBP
Retailer 4£17,170 GBP
Retailer 8£17,862 GBP
Retailer 5£18,028 GBP
Retailer 6£18,601 GBP
Retailer 10£19,200 GBP
Retailer 2£19,209 GBP
Retailer 7£19,316 GBP
Retailer 11£20,622 GBP
NZ Jewellers£24,324 GBP

31 data points across 11 retailers

13 retailers£15,262 GBP to £24,324 GBP

B+
Cheapest Retailer
-
£15,262 GBP
$20,481 USD
B+
Retailer 2
-
£16,630 GBP
CA$30,995 CAD
View
B+
Retailer 3
-
£17,170 GBP
$23,041 USD
View
B+
Retailer 4
-
£17,862 GBP
$23,970 USD
View
B+
Retailer 5
-
£18,028 GBP
$24,193 USD
View
B
Retailer 6
-
£18,601 GBP
$24,961 USD
View
B
Retailer 7
-
£19,200 GBP
$25,765 USD
View
B
Retailer 8
-
£19,209 GBP
View
B
Retailer 9
-
£19,316 GBP
$25,921 USD
View
Retailer 10
-
£19,978 GBP
$26,809 USD
View
Price last confirmed 52 days ago
B
Retailer 11
-
£20,622 GBP
$27,674 USD
View
Retailer 12
-
£20,746 GBP
$27,840 USD
View
Price last confirmed 57 days ago
Most Expensive
B
NZ Jewellers
bd60fdf9-aff0-4589-916b-e9535713f85c · Nov 2
£24,324 GBP
$32,641 USD
View
12 more retailers have this diamond
Prices start from £15,262 GBPSave up to £9,062 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.

B+
2.66ct Round
£15,262 GBP