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Round|Natural|GIA

0.66ct H SI2 Round Natural Diamond

VG • H/SI2 • GIA 5182091620

Certificate GIA 5182091620

Diamond specifications and retailer prices

From £559 GBP
$750 USD
As of November 1, 2026
Save £1,047 GBP (65%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,606 GBP at Diamond Quarter · As of November 2, 2026
View at Diamond Quarter

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 SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 5182091620. Listed at 7 retailers as of November 1, 2026, with prices from £559 to £1,606, a £1,047 spread on the same certified stone. Diamond Quarter lists it at £1,606. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.66
Carat
H
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5182091620
Dimensions5.72 × 5.68 × 3.38 mm
L/W Ratio1.01
Top View
5.72 mm5.68 mm0.66 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 5182091620
Side View
Table 58.0%Crown 33°Girdle: THN-MEDPavilion 41°Culet: NoneDepth 59.4%

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 1
Current: £665 GBP|Low: £559 GBP|High: £1,033 GBP|Avg: £717 GBP|+5.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 3, 2026
Retailer 4£559 GBP
Retailer 5£624 GBP
Retailer 1£665 GBP
Retailer 2£721 GBP
Retailer 3£1,020 GBP

38 data points across 5 retailers

7 retailers£559 GBP to £1,606 GBP

A
Cheapest Retailer
-
£559 GBP
$750 USD
B+
Retailer 2
-
£624 GBP
$838 USD
View
B+
Retailer 3
-
£665 GBP
View
B+
Retailer 4
-
£721 GBP
€922 EUR
View
B
Retailer 5
-
£957 GBP
€1,223 EUR
View
B
Retailer 6
-
£1,020 GBP
View
Most Expensive
C
Diamond Quarter
0.66SI2H51200965N · Nov 2
£1,606 GBP
View
6 more retailers have this diamond
Prices start from £559 GBPSave up to £1,047 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
£559 GBP