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Round|Natural|GIA

0.66ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 6542345500

Certificate GIA 6542345500

Diamond specifications and retailer prices

From £357 GBP
SGD 647 SGD
As of October 31, 2026
Save £351 GBP (50%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £708 GBP at Frank Darling · As of November 2, 2026
View at Frank Darling

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6542345500. Listed at 8 retailers as of October 31, 2026, with prices from £357 to £708, a £351 spread on the same certified stone. Frank Darling lists it at £708. 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
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6542345500
Dimensions5.56 × 5.58 × 3.47 mm
L/W Ratio1.00
Top View
5.56 mm5.58 mm0.66 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6542345500
Side View
Table 58.0%Crown 36.5°Girdle: THN-STKPavilion 41°Culet: NoneDepth 62.3%

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: Oct 31
Current: £708 GBP|Low: £357 GBP|High: £747 GBP|Avg: £564 GBP|-5.3%
Frank Darling
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5£357 GBP
Retailer 6£389 GBP
Retailer 4£506 GBP
Retailer 2£552 GBP
Retailer 3£563 GBP
Retailer 7£588 GBP
Retailer 8£674 GBP
Frank Darling£708 GBP

29 data points across 8 retailers

8 retailers£357 GBP to £708 GBP

A
Cheapest Retailer
-
£357 GBP
SGD 647 SGD
A
Retailer 2
-
£389 GBP
SGD 706 SGD
View
A
Retailer 3
-
£504 GBP
$677 USD
View
A
Retailer 4
-
£506 GBP
$679 USD
View
A
Retailer 5
-
£552 GBP
€706 EUR
View
A
Retailer 6
-
£563 GBP
View
Retailer 7
-
£588 GBP
$788 USD
View
Price last confirmed 7 days ago
Most Expensive
A
Frank Darling
2571627HK · Nov 2
£708 GBP
$949 USD
View
7 more retailers have this diamond
Prices start from £357 GBPSave up to £351 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
0.66ct Round
£357 GBP