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Round|Natural|GIA

0.66ct J I1 Round Natural Diamond

EX • J/I1 • GIA 1429708826

Certificate GIA 1429708826

Diamond specifications and retailer prices

From £221 GBP
₹28,290 INR
As of November 2, 2026
Save £315 GBP (59%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,135 GBP at NZ Jewellers · As of October 20, 2026
View at NZ Jewellers

About this 0.66ct natural round diamond

This 0.66ct natural round sits in the half to three-quarter carat band, graded J colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by GIA 1429708826. Listed at 9 retailers as of November 2, 2026, with a 142% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

0.66
Carat
J
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1429708826
Dimensions5.60 × 5.63 × 3.44 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Culet sizeNone
Key to symbols
Crystal, Feather
Top View
5.60 mm5.63 mm0.66 ctJ / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1429708826
Side View
Table 56.0%Crown 35°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 61.3%

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 2
Current: £1,135 GBP|Low: £221 GBP|High: £1,135 GBP|Avg: £469 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 3£221 GBP
Retailer 6£296 GBP
Retailer 4£323 GBP
Retailer 7£341 GBP
Retailer 5£430 GBP
Retailer 2£536 GBP
NZ Jewellers£1,135 GBP

44 data points across 7 retailers

9 retailers£221 GBP to £536 GBP

A
Cheapest Retailer
-
£221 GBP
₹28,290 INR
B+
Retailer 2
-
£258 GBP
HK$2,700 HKD
View
Retailer 3
-
£296 GBP
$397 USD
View
Price last confirmed 14 days ago
Retailer 4
-
£319 GBP
$428 USD
View
Price last confirmed 26 days ago
Retailer 5
-
£319 GBP
$428 USD
View
Price last confirmed 18 days ago
Retailer 6
-
£341 GBP
$458 USD
View
Price last confirmed 13 days ago
B+
Retailer 7
-
£430 GBP
$577 USD
View
B
Retailer 8
-
£536 GBP
€685 EUR
View
Most Expensive
NZ Jewellers
6f6e5b6e-d6be-4eaf-8838-811d86641dee · Oct 20
£1,135 GBP
$1,523 USD
View
Price last confirmed 13 days ago
8 more retailers have this diamond
Prices start from £221 GBPSave up to £315 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
£221 GBP