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Oval|Natural|GIA

1.20ct J SI1 Oval Natural Diamond

EX • J/SI1 • GIA 1553999146

Certificate GIA 1553999146

Diamond specifications and retailer prices

From £1,254 GBP
SGD 2,270 SGD
As of October 31, 2026
Save £1,186 GBP (49%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £2,439 GBP at Wholesale Diamonds Direct · As of October 26, 2026
View at Wholesale Diamonds Direct

About this 1.2ct natural oval diamond

This 1.2ct natural oval sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1553999146. Listed at 12 retailers as of October 26, 2026, with prices from £1,254 to £2,439, a £1,186 spread on the same certified stone. Wholesale Diamonds Direct lists it at £2,439. 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 (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.84°
Pavilion angle39.3°
OriginNatural
Grading LabGIA
CertificateGIA 1553999146
Dimensions8.27 × 5.95 × 3.70 mm
L/W Ratio1.39
Culet sizeNone
Top View
8.27 mm5.95 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553999146
Side View
Table 59.0%Crown 39.84°Girdle: STK-THKPavilion 39.3°Culet: NoneDepth 62.2%

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: £1,861 GBP|Low: £1,254 GBP|High: £2,611 GBP|Avg: £1,824 GBP|-7.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Wholesale Diamonds Direct
October 31, 2026
Retailer 9£1,254 GBP
Retailer 7£1,471 GBP
Retailer 6£1,484 GBP
Retailer 3£1,517 GBP
Retailer 2£1,616 GBP
Retailer 4£1,624 GBP
Retailer 10£1,764 GBP
Retailer 1£1,861 GBP
Retailer 11£1,883 GBP
Retailer 5£2,084 GBP
Retailer 8£2,261 GBP
Wholesale Diamonds Direct£2,439 GBP

31 data points across 12 retailers

12 retailers£1,254 GBP to £2,439 GBP

A
Cheapest Retailer
-
£1,254 GBP
SGD 2,270 SGD
A
Retailer 2
-
£1,471 GBP
$1,971 USD
View
A
Retailer 3
-
£1,484 GBP
$1,988 USD
View
B+
Retailer 4
-
£1,517 GBP
$2,032 USD
View
B+
Retailer 5
-
£1,616 GBP
SGD 2,926 SGD
View
B+
Retailer 6
-
£1,624 GBP
View
B+
Retailer 7
-
£1,764 GBP
$2,364 USD
View
B+
Retailer 8
-
£1,861 GBP
$2,493 USD
View
B+
Retailer 9
-
£1,883 GBP
$2,523 USD
View
B+
Retailer 10
-
£2,084 GBP
€2,660 EUR
View
B
Retailer 11
-
£2,261 GBP
$3,030 USD
View
Most Expensive
B
Wholesale Diamonds Direct
271990025 · Oct 26
£2,439 GBP
$3,268 USD
View
11 more retailers have this diamond
Prices start from £1,254 GBPSave up to £1,186 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 Oval
£1,254 GBP