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Round|Natural|GIA

0.66ct I IF Round Natural Diamond

EX • I/IF • GIA 6551035322

Certificate GIA 6551035322

Diamond specifications and retailer prices

From £639 GBP
$857 USD
As of November 2, 2026
Save £146 GBP (19%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: £785 GBP at Blue Nile · As of October 31, 2026
View at Blue Nile

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded I colour (near-colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by GIA 6551035322. Listed at 6 retailers as of October 31, 2026, with prices from £639 to £785, a £146 spread on the same certified stone. Blue Nile lists it at £785. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.66
Carat
I
Colour
IF
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6551035322
Dimensions5.51 × 5.55 × 3.48 mm
L/W Ratio1.01
Top View
5.51 mm5.55 mm0.66 ctI / IF
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551035322
Side View
Table 55.0%Crown 36.5°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 63.0%

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 2
Current: £785 GBP|Low: £591 GBP|High: £906 GBP|Avg: £724 GBP|-13.4%
Blue Nile
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 2, 2026
Retailer 4£639 GBP
Retailer 2£644 GBP
Retailer 5£697 GBP
Retailer 6£710 GBP
Retailer 3£713 GBP
Blue Nile£785 GBP

40 data points across 6 retailers

6 retailers£639 GBP to £785 GBP

A
Cheapest Retailer
-
£639 GBP
$857 USD
Final sale: no returns
A
Retailer 2
-
£644 GBP
MYR 3,517 MYR
View
A
Retailer 3
-
£697 GBP
$936 USD
View
A
Retailer 4
-
£710 GBP
SGD 1,287 SGD
View
A
Retailer 5
-
£713 GBP
View
Most Expensive
A
Blue Nile
28841913 · Oct 31
£785 GBP
$1,053 USD
View
5 more retailers have this diamond
Prices start from £639 GBPSave up to £146 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
£639 GBP