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Round|Natural|GIA

1.02ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1236370974

Certificate GIA 1236370974

Diamond specifications and retailer prices

From £1,903 GBP
HK$19,800 HKD
As of October 29, 2026
Save £2,509 GBP (57%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £4,412 GBP at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.02ct natural round diamond

This 1.02ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1236370974. Listed at 15 retailers as of October 29, 2026, with prices from £1,903 to £4,412, a £2,509 spread on the same certified stone. NZ Jewellers lists it at £4,412. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1236370974
Dimensions6.43 × 6.41 × 3.97 mm
L/W Ratio1.00
Star length55%
Lower girdle75%
Key to symbols
Crystal, Feather, Knot, Needle
Top View
6.43 mm6.41 mm1.02 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1236370974
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.9%

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 29
Current: £2,630 GBP|Low: £1,903 GBP|High: £4,287 GBP|Avg: £2,779 GBP|+2.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 6£1,903 GBP
Retailer 7£2,248 GBP
Retailer 8£2,338 GBP
Retailer 10£2,444 GBP
Retailer 2£2,533 GBP
Retailer 1£2,630 GBP
Retailer 9£2,706 GBP
Retailer 3£2,966 GBP
Retailer 5£3,084 GBP
Retailer 4£4,258 GBP

44 data points across 10 retailers

15 retailers£1,903 GBP to £4,412 GBP

A
Cheapest Retailer
-
£1,903 GBP
HK$19,800 HKD
A
Retailer 2
-
£2,248 GBP
$2,994 USD
View
B+
Retailer 3
-
£2,338 GBP
$3,113 USD
View
Final sale: no returns
B+
Retailer 4
-
£2,444 GBP
$3,255 USD
View
B+
Retailer 5
-
£2,533 GBP
$3,373 USD
View
B+
Retailer 6
-
£2,533 GBP
$3,373 USD
View
B+
Retailer 7
-
£2,630 GBP
$3,502 USD
View
B+
Retailer 8
-
£2,630 GBP
View
B+
Retailer 9
-
£2,641 GBP
$3,517 USD
View
Retailer 10
-
£2,706 GBP
A$5,543 AUD
View
Price last confirmed 22 days ago
B+
Retailer 11
-
£2,923 GBP
$3,892 USD
View
B+
Retailer 12
-
£2,966 GBP
€3,762 EUR
View
B+
Retailer 13
-
£3,084 GBP
ZAR 66,347 ZAR
View
B
Retailer 14
-
£4,258 GBP
View
Most Expensive
B
NZ Jewellers
c1f75fdc-853b-40e8-9dbe-3ee0c257e535 · Oct 30
£4,412 GBP
$5,876 USD
View
14 more retailers have this diamond
Prices start from £1,903 GBPSave up to £2,509 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
£1,903 GBP