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Round|Natural|GIA

0.66ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2231688609

Certificate GIA 2231688609

Diamond specifications and retailer prices

From £779 GBP
$1,045 USD
As of November 1, 2026
Save £862 GBP (53%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,641 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2231688609. Listed at 10 retailers as of November 1, 2026, with prices from £779 to £1,641, a £862 spread on the same certified stone. MOH London lists it at £1,641. 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

0.66
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2231688609
Dimensions5.58 × 5.61 × 3.44 mm
L/W Ratio1.01
Culet sizeNone
Top View
5.58 mm5.61 mm0.66 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2231688609
Side View
Table 59.0%CrownGirdle: MED-STKPavilionCulet: NoneDepth 61.5%

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 1
Current: £1,641 GBP|Low: £968 GBP|High: £1,661 GBP|Avg: £1,239 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 3, 2026
Retailer 6£1,012 GBP
Retailer 2£1,016 GBP
Retailer 3£1,157 GBP
Retailer 4£1,171 GBP
Retailer 5£1,457 GBP
MOH London£1,641 GBP

43 data points across 6 retailers

10 retailers£779 GBP to £1,641 GBP

B+
Cheapest Retailer
-
£779 GBP
$1,045 USD
B
Retailer 2
-
£976 GBP
$1,310 USD
View
B
Retailer 3
-
£976 GBP
$1,310 USD
View
B
Retailer 4
-
£1,012 GBP
$1,358 USD
View
B
Retailer 5
-
£1,013 GBP
$1,360 USD
View
B
Retailer 6
-
£1,016 GBP
View
B
Retailer 7
-
£1,157 GBP
€1,479 EUR
View
Retailer 8
-
£1,171 GBP
A$2,418 AUD
View
Price last confirmed 29 days ago
B
Retailer 9
-
£1,457 GBP
CA$2,716 CAD
View
Most Expensive
B
MOH London
F73821336 · Nov 1
£1,641 GBP
View
9 more retailers have this diamond
Prices start from £779 GBPSave up to £862 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+
0.66ct Round
£779 GBP