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Round|Natural|GIA

1.00ct K SI2 Round Natural Diamond

EX • K/SI2 • GIA 6505210996

Certificate GIA 6505210996

Diamond specifications and retailer prices

From £1,074 GBP
As of November 5, 2026
Save £2,542 GBP (70%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £3,615 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 K colour (faint-tinted) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6505210996. Listed at 18 retailers as of November 5, 2026, with prices from £1,074 to £3,615, a £2,542 spread on the same certified stone. NZ Jewellers lists it at £3,615. 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
K
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 6505210996
Dimensions6.42 × 6.39 × 3.99 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.42 mm6.39 mm1.00 ctK / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6505210996
Side View
Table 58.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°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 5
Current: £1,438 GBP|Low: £1,074 GBP|High: £2,611 GBP|Avg: £1,524 GBP|-1.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 3£1,074 GBP
Retailer 7£1,084 GBP
Retailer 8£1,340 GBP
Retailer 9£1,382 GBP
Retailer 6£1,424 GBP
Retailer 1£1,438 GBP
Retailer 2£1,600 GBP
Retailer 5£1,826 GBP
Retailer 4£2,590 GBP

32 data points across 9 retailers

18 retailers£1,074 GBP to £3,615 GBP

A
Cheapest Retailer
-
£1,074 GBP
A
Retailer 2
-
£1,084 GBP
View
B+
Retailer 3
-
£1,300 GBP
View
B+
Retailer 4
-
£1,340 GBP
View
B+
Retailer 5
-
£1,382 GBP
View
B+
Retailer 6
-
£1,424 GBP
View
B+
Retailer 7
-
£1,438 GBP
View
Retailer 8
-
£1,482 GBP
View
Price last confirmed 8 days ago
B+
Retailer 9
-
£1,482 GBP
View
B+
Retailer 10
-
£1,505 GBP
View
B+
Retailer 11
-
£1,551 GBP
View
B+
Retailer 12
-
£1,585 GBP
View
B+
Retailer 13
-
£1,600 GBP
View
B
Retailer 14
-
£1,710 GBP
View
B
Retailer 15
-
£1,826 GBP
View
B
Retailer 16
-
£2,109 GBP
View
B
Retailer 17
-
£2,590 GBP
View
Most Expensive
C
NZ Jewellers
98a302cd-3331-4711-b280-640809bb727d · Nov 5
£3,615 GBP
$4,866 USD
View
17 more retailers have this diamond
Prices start from £1,074 GBPSave up to £2,542 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
£1,074 GBP