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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6441577858

Certificate GIA 6441577858

Diamond specifications and retailer prices

From £882 GBP
As of October 31, 2026
Save £2,109 GBP (71%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £2,991 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct 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 6441577858. Listed at 17 retailers as of October 31, 2026, with prices from £882 to £2,991, a £2,109 spread on the same certified stone. NZ Jewellers lists it at £2,991. 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

1.00
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6441577858
Dimensions6.40 × 6.33 × 4.00 mm
L/W Ratio1.01
Top View
6.40 mm6.33 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceStrong
CertificateGIA 6441577858
Side View
Table 56.0%Crown 36.5°Girdle: THN-STKPavilion 40.8°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: £1,173 GBP|Low: £880 GBP|High: £2,175 GBP|Avg: £1,329 GBP|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5£882 GBP
Retailer 6£894 GBP
Retailer 7£1,132 GBP
Retailer 1£1,173 GBP
Retailer 2£1,345 GBP
Retailer 4£1,518 GBP
Retailer 3£2,148 GBP

35 data points across 7 retailers

17 retailers£882 GBP to £2,991 GBP

A
Cheapest Retailer
-
£882 GBP
A
Retailer 2
-
£894 GBP
View
Retailer 3
-
£1,104 GBP
View
Price last confirmed 82 days ago
B+
Retailer 4
-
£1,132 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,146 GBP
View
A
Retailer 6
-
£1,173 GBP
View
B+
Retailer 7
-
£1,227 GBP
View
Retailer 8
-
£1,227 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,239 GBP
View
B+
Retailer 10
-
£1,283 GBP
View
B+
Retailer 11
-
£1,342 GBP
View
B+
Retailer 12
-
£1,345 GBP
View
B+
Retailer 13
-
£1,415 GBP
View
B+
Retailer 14
-
£1,518 GBP
View
B
Retailer 15
-
£2,148 GBP
View
B
Retailer 16
-
£2,308 GBP
View
Most Expensive
C
NZ Jewellers
cdd2c3d5-0205-49b5-b7d2-5964aef1b29c · Nov 5
£2,991 GBP
$4,026 USD
View
16 more retailers have this diamond
Prices start from £882 GBPSave up to £2,109 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
1.00ct Round
£882 GBP