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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2566395736

Certificate GIA 2566395736

Diamond specifications and retailer prices

From £1,148 GBP
SGD 2,078 SGD
As of October 31, 2026
Save £1,071 GBP (48%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,219 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2566395736. Listed at 10 retailers as of October 26, 2026, with prices from £1,148 to £2,219, a £1,071 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,219. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2566395736
Dimensions6.72 × 4.24 × 4.24 mm
L/W Ratio1.58
Culet sizeNone
Top View
6.72 mm4.24 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2566395736
Side View
Table 57.0%Crown 36.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.9%

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: Oct 31
Current: £1,467 GBP|Low: £1,148 GBP|High: £2,305 GBP|Avg: £1,679 GBP|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Wholesale Diamonds Direct
October 31, 2026
Retailer 6£1,148 GBP
Retailer 3£1,338 GBP
Retailer 1£1,467 GBP
Retailer 8£1,470 GBP
Retailer 2£1,470 GBP
Retailer 4£1,478 GBP
Retailer 7£1,744 GBP
Retailer 9£1,791 GBP
Retailer 5£2,058 GBP
Wholesale Diamonds Direct£2,219 GBP

34 data points across 10 retailers

10 retailers£1,148 GBP to £2,219 GBP

A
Cheapest Retailer
-
£1,148 GBP
SGD 2,078 SGD
A
Retailer 2
-
£1,338 GBP
$1,793 USD
View
A
Retailer 3
-
£1,467 GBP
$1,965 USD
View
A
Retailer 4
-
£1,470 GBP
SGD 2,662 SGD
View
A
Retailer 5
-
£1,470 GBP
View
A
Retailer 6
-
£1,478 GBP
$1,980 USD
View
B+
Retailer 7
-
£1,744 GBP
$2,337 USD
View
B+
Retailer 8
-
£1,791 GBP
View
B
Retailer 9
-
£2,058 GBP
$2,758 USD
View
Most Expensive
B+
Wholesale Diamonds Direct
571683449 · Oct 26
£2,219 GBP
$2,973 USD
View
9 more retailers have this diamond
Prices start from £1,148 GBPSave up to £1,071 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
1.20ct Round
£1,148 GBP