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Round|Natural|GIA

1.02ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 1375710423

Certificate GIA 1375710423

Diamond specifications and retailer prices

From £1,560 GBP
As of November 1, 2026
Save £2,505 GBP (62%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £4,066 GBP at NZ Jewellers · As of November 5, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1375710423. Listed at 13 retailers as of November 1, 2026, with prices from £1,560 to £4,066, a £2,505 spread on the same certified stone. NZ Jewellers lists it at £4,066. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41.8°
OriginNatural
Grading LabGIA
CertificateGIA 1375710423
Dimensions6.51 × 6.47 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Cert comments
Clouds, pinpoints and surface graining are not shown.
Top View
6.51 mm6.47 mm1.02 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1375710423
Side View
Table 60.0%Crown 33°Girdle: MED-STKPavilion 41.8°Culet: NoneDepth 61.4%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £2,045 GBP|Low: £1,560 GBP|High: £3,447 GBP|Avg: £2,105 GBP|+2.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 6£1,560 GBP
Retailer 9£1,591 GBP
Retailer 8£1,699 GBP
Retailer 7£1,757 GBP
Retailer 2£1,843 GBP
Retailer 10£1,893 GBP
Retailer 1£2,045 GBP
Retailer 3£2,373 GBP
Retailer 4£2,412 GBP
Retailer 5£3,398 GBP

44 data points across 10 retailers

13 retailers£1,560 GBP to £4,066 GBP

B+
Cheapest Retailer
-
£1,560 GBP
B+
Retailer 2
-
£1,591 GBP
View
B+
Retailer 3
-
£1,699 GBP
View
B
Retailer 4
-
£1,757 GBP
View
B
Retailer 5
-
£1,762 GBP
View
Retailer 6
-
£1,762 GBP
View
Price last confirmed 8 days ago
B
Retailer 7
-
£1,843 GBP
View
B
Retailer 8
-
£2,033 GBP
View
B
Retailer 9
-
£2,045 GBP
View
B
Retailer 10
-
£2,373 GBP
View
B
Retailer 11
-
£2,412 GBP
View
B
Retailer 12
-
£3,398 GBP
View
Most Expensive
B
NZ Jewellers
c17f7fe0-5094-48ee-a955-905dd99e7998 · Nov 5
£4,066 GBP
$5,472 USD
View
12 more retailers have this diamond
Prices start from £1,560 GBPSave up to £2,505 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.

B+
1.02ct Round
£1,560 GBP