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Round|Natural|GIA

1.02ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 1428908142

Certificate GIA 1428908142

Diamond specifications and retailer prices

From £1,892 GBP
As of November 6, 2026
Save £3,166 GBP (63%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £5,058 GBP at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.02ct natural round diamond

This 1.02ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1428908142. Listed at 19 retailers as of November 5, 2026, with prices from £1,892 to £5,058, a £3,166 spread on the same certified stone. Diamond Quarter lists it at £5,058. 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

1.02
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1428908142
Dimensions6.44 × 6.40 × 4.00 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Cloud, Knot
Top View
6.44 mm6.40 mm1.02 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1428908142
Side View
Table 58.0%Crown 34.5°Girdle: THN-STKPavilion 41.4°Culet: NoneDepth 62.3%

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: Nov 6
Current: £1,892 GBP|Low: £1,892 GBP|High: £4,429 GBP|Avg: £2,798 GBP|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1£1,892 GBP
Retailer 8£1,921 GBP
Retailer 9£2,415 GBP
Retailer 2£2,504 GBP
Retailer 3£2,675 GBP
Retailer 4£2,691 GBP
Retailer 7£2,785 GBP
Retailer 5£3,194 GBP
Retailer 6£4,365 GBP

29 data points across 9 retailers

19 retailers£1,892 GBP to £5,058 GBP

A
Cheapest Retailer
-
£1,892 GBP
B+
Retailer 2
-
£1,921 GBP
View
B+
Retailer 3
-
£2,279 GBP
View
B
Retailer 4
-
£2,415 GBP
View
Final sale: no returns
Retailer 5
-
£2,447 GBP
View
Price last confirmed 109 days ago
B+
Retailer 6
-
£2,504 GBP
View
B+
Retailer 7
-
£2,519 GBP
View
B+
Retailer 8
-
£2,617 GBP
View
B
Retailer 9
-
£2,675 GBP
View
B+
Retailer 10
-
£2,691 GBP
View
B
Retailer 11
-
£2,725 GBP
View
B+
Retailer 12
-
£2,785 GBP
View
Retailer 13
-
£2,795 GBP
View
Price last confirmed 29 days ago
B
Retailer 14
-
£3,020 GBP
View
B
Retailer 15
-
£3,194 GBP
View
B
Retailer 16
-
£3,395 GBP
View
B
Retailer 17
-
£4,365 GBP
View
B
Retailer 18
-
£4,559 GBP
View
Most Expensive
B
Diamond Quarter
1.02SI1H1442F009N · Nov 5
£5,058 GBP
View
18 more retailers have this diamond
Prices start from £1,892 GBPSave up to £3,166 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
1.02ct Round
£1,892 GBP