Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1529068672

Certificate GIA 1529068672

Diamond specifications and retailer prices

From £1,482 GBP
$1,986 USD
As of October 31, 2026
Save £2,089 GBP (58%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £4,312 GBP at NZ Jewellers · As of October 3, 2026
View at NZ Jewellers

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 1529068672. Listed at 24 retailers as of October 29, 2026, with a 141% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1529068672
Dimensions6.78 × 6.73 × 4.24 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal, Needle, Indented Natural, Natural
Top View
6.78 mm6.73 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1529068672
Side View
Table 59.0%Crown 35°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 62.8%

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: £2,492 GBP|Low: £1,482 GBP|High: £4,117 GBP|Avg: £2,198 GBP|-0.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
October 31, 2026
Retailer 8£1,482 GBP
Retailer 12£1,538 GBP
Retailer 10£1,567 GBP
Retailer 16£1,628 GBP
Retailer 6£1,660 GBP
Retailer 4£1,694 GBP
Retailer 2£1,696 GBP
Retailer 13£1,825 GBP
Retailer 17£1,930 GBP
Retailer 3£2,112 GBP
Retailer 5£2,112 GBP
Retailer 14£2,154 GBP
Retailer 7£2,179 GBP
Retailer 11£2,311 GBP
Retailer 15£2,378 GBP
Retailer 9£2,382 GBP
Retailer 18£2,481 GBP
Retailer 1£2,492 GBP
Retailer 19£3,571 GBP

24 data points across 19 retailers

24 retailers£1,482 GBP to £3,571 GBP

A
Cheapest Retailer
-
£1,482 GBP
$1,986 USD
A
Retailer 2
-
£1,538 GBP
HK$16,100 HKD
View
Retailer 3
-
£1,567 GBP
₹200,004 INR
View
Price last confirmed 16 days ago
A
Retailer 4
-
£1,628 GBP
$2,182 USD
View
B+
Retailer 5
-
£1,660 GBP
$2,224 USD
View
B+
Retailer 6
-
£1,694 GBP
$2,270 USD
View
B+
Retailer 7
-
£1,696 GBP
$2,272 USD
View
Final sale: no returns
B+
Retailer 8
-
£1,825 GBP
$2,445 USD
View
B+
Retailer 9
-
£1,930 GBP
View
Retailer 10
-
£2,063 GBP
$2,764 USD
View
Price last confirmed 24 days ago
Retailer 11
-
£2,063 GBP
$2,764 USD
View
Price last confirmed 16 days ago
B
Retailer 12
-
£2,112 GBP
$2,830 USD
View
B
Retailer 13
-
£2,112 GBP
$2,830 USD
View
Retailer 14
-
£2,137 GBP
SGD 3,869 SGD
View
Price last confirmed 16 days ago
Retailer 15
-
£2,142 GBP
$2,870 USD
View
Price last confirmed 16 days ago
B+
Retailer 16
-
£2,154 GBP
View
B
Retailer 17
-
£2,179 GBP
$2,920 USD
View
Retailer 18
-
£2,311 GBP
A$4,764 AUD
View
Price last confirmed 24 days ago
B+
Retailer 19
-
£2,378 GBP
€3,034 EUR
View
Retailer 20
-
£2,380 GBP
$3,189 USD
View
Price last confirmed 22 days ago
B
Retailer 21
-
£2,481 GBP
$3,324 USD
View
B
Retailer 22
-
£2,492 GBP
ZAR 53,946 ZAR
View
B
Retailer 23
-
£3,571 GBP
View
Most Expensive
NZ Jewellers
bf041d67-0ec4-4b79-bf90-36d06de6a248 · Oct 3
£4,312 GBP
$5,778 USD
View
Price last confirmed 28 days ago
23 more retailers have this diamond
Prices start from £1,482 GBPSave up to £2,089 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
£1,482 GBP