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Round|Natural|GIA

1.00ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 6525508015

Certificate GIA 6525508015

Diamond specifications and retailer prices

From £1,626 GBP
As of November 4, 2026
Save £2,067 GBP (56%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: £4,419 GBP at NZ Jewellers · As of October 3, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6525508015. Listed at 20 retailers as of November 4, 2026, with a 127% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6525508015
Dimensions6.40 × 6.37 × 3.91 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.40 mm6.37 mm1.00 ctD / SI2
OriginNatural
CutExcellent
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateGIA 6525508015
Side View
Table 59.0%Crown 36°Girdle: THN-STKPavilion 40.6°Culet: NoneDepth 61.2%

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 4
Current: £2,258 GBP|Low: £1,626 GBP|High: £3,747 GBP|Avg: £2,478 GBP
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 8£1,626 GBP
Retailer 5£1,694 GBP
Retailer 6£1,894 GBP
Retailer 10£1,947 GBP
Retailer 2£1,951 GBP
Retailer 3£2,224 GBP
Retailer 1£2,258 GBP
Retailer 4£2,454 GBP
Retailer 7£3,693 GBP
Retailer 9£3,736 GBP

35 data points across 10 retailers

20 retailers£1,626 GBP to £3,693 GBP

A
Cheapest Retailer
-
£1,626 GBP
A
Retailer 2
-
£1,694 GBP
View
A
Retailer 3
-
£1,894 GBP
View
A
Retailer 4
-
£1,947 GBP
View
A
Retailer 5
-
£1,951 GBP
View
Final sale: no returns
A
Retailer 6
-
£2,011 GBP
View
Retailer 7
-
£2,113 GBP
View
Price last confirmed 29 days ago
Retailer 8
-
£2,113 GBP
View
Price last confirmed 29 days ago
Retailer 9
-
£2,113 GBP
View
Price last confirmed 39 days ago
B+
Retailer 10
-
£2,155 GBP
View
Retailer 11
-
£2,195 GBP
View
Price last confirmed 38 days ago
B+
Retailer 12
-
£2,219 GBP
View
B+
Retailer 13
-
£2,224 GBP
View
B+
Retailer 14
-
£2,258 GBP
View
Retailer 15
-
£2,438 GBP
View
Price last confirmed 38 days ago
B+
Retailer 16
-
£2,454 GBP
View
B
Retailer 17
-
£3,693 GBP
View
Retailer 18
-
£3,736 GBP
View
Price last confirmed 9 days ago
Retailer 19
-
£4,419 GBP
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
c33334bf-ecea-4bc2-9b6f-720edc750f50 · Oct 3
£4,419 GBP
$5,947 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from £1,626 GBPSave up to £2,067 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
£1,626 GBP