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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2544928323

Certificate GIA 2544928323

Diamond specifications and retailer prices

From £1,768 GBP
As of November 5, 2026
Save £2,307 GBP (57%) vs most expensive(unlock to see where)
23 retailers carry this diamond
Most expensive: £4,075 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2544928323. Listed at 23 retailers as of November 5, 2026, with prices from £1,768 to £4,075, a £2,307 spread on the same certified stone. NZ Jewellers lists it at £4,075. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2544928323
Dimensions6.29 × 6.34 × 3.98 mm
L/W Ratio1.01
Top View
6.29 mm6.34 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2544928323
Side View
Table 58.0%Crown 36°Girdle: THN-STKPavilion 40.8°Culet: NoneDepth 62.9%

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: Nov 5
Current: £4,075 GBP|Low: £1,768 GBP|High: £4,267 GBP|Avg: £2,508 GBP|-4.5%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
November 6, 2026
Retailer 22£1,768 GBP
Retailer 12£1,882 GBP
Retailer 8£1,898 GBP
Retailer 16£1,943 GBP
Retailer 19£1,956 GBP
Retailer 18£1,960 GBP
Retailer 15£1,973 GBP
Retailer 6£2,119 GBP
Retailer 5£2,190 GBP
Retailer 10£2,201 GBP
Retailer 2£2,238 GBP
Retailer 3£2,311 GBP
Retailer 9£2,311 GBP
Retailer 13£2,385 GBP
Retailer 20£2,445 GBP
Retailer 7£2,461 GBP
Retailer 17£2,562 GBP
Retailer 4£2,773 GBP
Retailer 14£2,776 GBP
Retailer 21£2,855 GBP
Retailer 11£4,002 GBP
NZ Jewellers£4,075 GBP

21 data points across 22 retailers

23 retailers£1,768 GBP to £4,075 GBP

A
Cheapest Retailer
-
£1,768 GBP
A
Retailer 2
-
£1,882 GBP
View
A
Retailer 3
-
£1,898 GBP
View
A
Retailer 4
-
£1,943 GBP
View
A
Retailer 5
-
£1,956 GBP
View
Final sale: no returns
A
Retailer 6
-
£1,960 GBP
View
A
Retailer 7
-
£1,973 GBP
View
A
Retailer 8
-
£2,119 GBP
View
A
Retailer 9
-
£2,190 GBP
View
A
Retailer 10
-
£2,201 GBP
View
A
Retailer 11
-
£2,238 GBP
View
A
Retailer 12
-
£2,311 GBP
View
A
Retailer 13
-
£2,311 GBP
View
B+
Retailer 14
-
£2,385 GBP
View
B+
Retailer 15
-
£2,445 GBP
View
B+
Retailer 16
-
£2,461 GBP
View
B+
Retailer 17
-
£2,562 GBP
View
Retailer 18
-
£2,673 GBP
View
Price last confirmed 30 days ago
B+
Retailer 19
-
£2,773 GBP
View
Retailer 20
-
£2,776 GBP
View
Price last confirmed 14 days ago
B+
Retailer 21
-
£2,855 GBP
View
B
Retailer 22
-
£4,002 GBP
View
Most Expensive
B
NZ Jewellers
c04f7c52-73fe-46cf-977c-12a3468ca840 · Nov 5
£4,075 GBP
$5,485 USD
View
22 more retailers have this diamond
Prices start from £1,768 GBPSave up to £2,307 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
£1,768 GBP