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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2554908315

Certificate GIA 2554908315

Diamond specifications and retailer prices

From £1,245 GBP
As of November 5, 2026
Save £1,108 GBP (47%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £2,353 GBP at Wholesale Diamonds Direct · As of November 6, 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 2554908315. Listed at 8 retailers as of November 5, 2026, with prices from £1,245 to £2,353, a £1,108 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,353. 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°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 2554908315
Dimensions6.80 × 6.76 × 4.15 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.80 mm6.76 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554908315
Side View
Table 59.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NDepth 61.3%

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: Nov 5
Current: £1,423 GBP|Low: £1,238 GBP|High: £2,615 GBP|Avg: £1,865 GBP|-10.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Wholesale Diamonds Direct
November 6, 2026
Retailer 3£1,245 GBP
Retailer 1£1,423 GBP
Retailer 2£1,451 GBP
Retailer 7£1,563 GBP
Retailer 4£1,812 GBP
Retailer 6£1,833 GBP
Retailer 8£2,175 GBP
Retailer 5£2,188 GBP
Wholesale Diamonds Direct£2,353 GBP

30 data points across 9 retailers

8 retailers£1,245 GBP to £2,353 GBP

A
Cheapest Retailer
-
£1,245 GBP
A
Retailer 2
-
£1,423 GBP
View
A
Retailer 3
-
£1,451 GBP
View
A
Retailer 4
-
£1,563 GBP
View
B+
Retailer 5
-
£1,812 GBP
View
B+
Retailer 6
-
£1,833 GBP
View
B
Retailer 7
-
£2,188 GBP
View
Most Expensive
B
Wholesale Diamonds Direct
611346681 · Nov 6
£2,353 GBP
$3,150 USD
View
7 more retailers have this diamond
Prices start from £1,245 GBPSave up to £1,108 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
£1,245 GBP