Round|Natural|GIA

1.01ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 2487928817

Certificate GIA 2487928817

Diamond specifications and retailer prices

From £1,032 GBP
HK$10,800 HKD
As of October 30, 2026
Save £1,419 GBP (58%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £3,600 GBP at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

About this 1.01ct natural round diamond

This 1.01ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2487928817. Listed at 17 retailers as of October 26, 2026, with a 138% 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

1.01
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2487928817
Dimensions6.40 × 6.37 × 3.99 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.40 mm6.37 mm1.01 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2487928817
Side View
Table 59.0%Crown 34°Girdle: ThickPavilion 41.4°Culet: NoneDepth 62.5%

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 30
Current: £1,511 GBP|Low: £1,032 GBP|High: £2,617 GBP|Avg: £1,556 GBP|-2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 12£1,032 GBP
Retailer 11£1,225 GBP
Retailer 9£1,273 GBP
Retailer 10£1,290 GBP
Retailer 7£1,353 GBP
Retailer 4£1,374 GBP
Retailer 2£1,441 GBP
Retailer 8£1,500 GBP
Retailer 1£1,511 GBP
Retailer 3£1,756 GBP
Retailer 5£1,908 GBP
Retailer 6£2,451 GBP

34 data points across 12 retailers

17 retailers£1,032 GBP to £2,451 GBP

A
Cheapest Retailer
-
£1,032 GBP
HK$10,800 HKD
A
Retailer 2
-
£1,225 GBP
$1,642 USD
View
B+
Retailer 3
-
£1,273 GBP
$1,706 USD
View
A
Retailer 4
-
£1,290 GBP
$1,728 USD
View
Final sale: no returns
B+
Retailer 5
-
£1,353 GBP
$1,813 USD
View
B+
Retailer 6
-
£1,441 GBP
SGD 2,610 SGD
View
Retailer 7
-
£1,475 GBP
$1,977 USD
View
Price last confirmed 23 days ago
Retailer 8
-
£1,476 GBP
$1,978 USD
View
Price last confirmed 23 days ago
B+
Retailer 9
-
£1,500 GBP
$2,010 USD
View
B+
Retailer 10
-
£1,511 GBP
View
Retailer 11
-
£1,544 GBP
$2,069 USD
View
Price last confirmed 31 days ago
Retailer 12
-
£1,703 GBP
$2,282 USD
View
Price last confirmed 54 days ago
Retailer 13
-
£1,703 GBP
$2,282 USD
View
Price last confirmed 32 days ago
B+
Retailer 14
-
£1,908 GBP
€2,435 EUR
View
B
Retailer 15
-
£2,451 GBP
View
Retailer 16
-
£3,600 GBP
$4,823 USD
View
Price last confirmed 50 days ago
Most Expensive
NZ Jewellers
2105d1f5-fcce-43ff-8434-dd5e975e32f8 · Sep 28
£3,600 GBP
$4,823 USD
View
Price last confirmed 33 days ago
16 more retailers have this diamond
Prices start from £1,032 GBPSave up to £1,419 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
1.01ct Round
£1,032 GBP