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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1435831747

Certificate GIA 1435831747

Diamond specifications and retailer prices

From £2,155 GBP
As of November 4, 2026
Save £3,141 GBP (59%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £5,296 GBP at Diamond Quarter · As of November 6, 2026
View at Diamond Quarter

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 1435831747. Listed at 28 retailers as of November 4, 2026, with prices from £2,155 to £5,296, a £3,141 spread on the same certified stone. Diamond Quarter lists it at £5,296. 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
PolishExcellent
SymmetryVery Good
FluorescenceMedium
Crown angle33°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1435831747
Dimensions6.55 × 6.47 × 3.82 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Key to symbols
Crystal, Feather, Cavity, Needle, Natural
Top View
6.55 mm6.47 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceMedium
CertificateGIA 1435831747
Side View
Table 61.0%Crown 33°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 58.6%

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: £3,147 GBP|Low: £1,993 GBP|High: £4,997 GBP|Avg: £2,960 GBP|+5.6%
Retailer 1
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Retailer 24
November 5, 2026
Retailer 5£2,155 GBP
Retailer 6£2,203 GBP
Retailer 20£2,251 GBP
Retailer 11£2,306 GBP
Retailer 16£2,355 GBP
Retailer 13£2,398 GBP
Retailer 7£2,500 GBP
Retailer 3£2,598 GBP
Retailer 8£2,598 GBP
Retailer 4£2,698 GBP
Retailer 21£2,826 GBP
Retailer 19£2,887 GBP
Retailer 17£2,956 GBP
Retailer 10£2,998 GBP
Retailer 23£3,002 GBP
Retailer 24£3,002 GBP
Retailer 14£3,085 GBP
Retailer 2£3,098 GBP
Retailer 1£3,147 GBP
Retailer 15£3,247 GBP
Retailer 18£3,297 GBP
Retailer 12£3,500 GBP
Retailer 22£4,796 GBP
Retailer 9£4,997 GBP

37 data points across 24 retailers

28 retailers£2,155 GBP to £5,296 GBP

A
Cheapest Retailer
-
£2,155 GBP
A
Retailer 2
-
£2,203 GBP
View
A
Retailer 3
-
£2,251 GBP
View
B+
Retailer 4
-
£2,306 GBP
View
B+
Retailer 5
-
£2,355 GBP
View
B+
Retailer 6
-
£2,387 GBP
View
B+
Retailer 7
-
£2,398 GBP
View
Final sale: no returns
B+
Retailer 8
-
£2,500 GBP
View
Retailer 9
-
£2,598 GBP
View
Price last confirmed 15 days ago
Retailer 10
-
£2,598 GBP
View
Price last confirmed 13 days ago
Retailer 11
-
£2,698 GBP
View
Price last confirmed 15 days ago
Retailer 12
-
£2,719 GBP
View
Price last confirmed 25 days ago
B+
Retailer 13
-
£2,826 GBP
View
Retailer 14
-
£2,826 GBP
View
Price last confirmed 8 days ago
B+
Retailer 15
-
£2,887 GBP
View
Retailer 16
-
£2,956 GBP
View
Price last confirmed 29 days ago
Retailer 17
-
£2,998 GBP
View
Price last confirmed 14 days ago
B
Retailer 18
-
£3,002 GBP
View
B
Retailer 19
-
£3,002 GBP
View
B+
Retailer 20
-
£3,085 GBP
View
B+
Retailer 21
-
£3,098 GBP
View
B+
Retailer 22
-
£3,147 GBP
View
Retailer 23
-
£3,247 GBP
View
Price last confirmed 14 days ago
B+
Retailer 24
-
£3,297 GBP
View
B
Retailer 25
-
£3,500 GBP
View
B
Retailer 26
-
£4,796 GBP
View
Retailer 27
-
£4,997 GBP
View
Price last confirmed 14 days ago
Most Expensive
B
Diamond Quarter
1.0SI1D1447F491N · Nov 6
£5,296 GBP
View
27 more retailers have this diamond
Prices start from £2,155 GBPSave up to £3,141 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
£2,155 GBP