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Round|Natural|GIA

1.01ct D SI1 Round Natural Diamond

GD • D/SI1 • GIA 2556450146

Certificate GIA 2556450146

Diamond specifications and retailer prices

From £1,635 GBP
As of November 4, 2026
Save £2,734 GBP (63%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £4,370 GBP at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.01ct natural round diamond

This 1.01ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a standard cut grade and certified by GIA 2556450146. Listed at 25 retailers as of November 4, 2026, with prices from £1,635 to £4,370, a £2,734 spread on the same certified stone. NZ Jewellers lists it at £4,370. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.01
Carat
D
Colour
SI1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle40°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2556450146
Dimensions6.03 × 6.13 × 4.07 mm
L/W Ratio1.02
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
6.03 mm6.13 mm1.01 ctD / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2556450146
Side View
Table 62.0%Crown 40°Girdle: THK-VTKPavilion 41°Culet: NoneDepth 66.8%

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: £4,370 GBP|Low: £1,626 GBP|High: £4,370 GBP|Avg: £2,365 GBP
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
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Retailer 11
Retailer 12
Retailer 13
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Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
Retailer 24
November 6, 2026
Retailer 5£1,635 GBP
Retailer 21£1,641 GBP
Retailer 11£1,847 GBP
Retailer 15£1,872 GBP
Retailer 22£1,872 GBP
Retailer 12£1,929 GBP
Retailer 2£2,000 GBP
Retailer 3£2,046 GBP
Retailer 6£2,051 GBP
Retailer 4£2,072 GBP
Retailer 8£2,090 GBP
Retailer 10£2,090 GBP
Retailer 9£2,170 GBP
Retailer 7£2,195 GBP
Retailer 18£2,199 GBP
Retailer 13£2,279 GBP
Retailer 23£2,394 GBP
Retailer 14£2,412 GBP
Retailer 19£2,444 GBP
Retailer 20£2,551 GBP
Retailer 16£3,083 GBP
Retailer 17£3,170 GBP
Retailer 24£3,651 GBP
NZ Jewellers£4,370 GBP

19 data points across 24 retailers

25 retailers£1,635 GBP to £4,370 GBP

A
Cheapest Retailer
-
£1,635 GBP
A
Retailer 2
-
£1,641 GBP
View
A
Retailer 3
-
£1,847 GBP
View
B+
Retailer 4
-
£1,872 GBP
View
A
Retailer 5
-
£1,872 GBP
View
A
Retailer 6
-
£1,929 GBP
View
Final sale: no returns
A
Retailer 7
-
£2,000 GBP
View
B+
Retailer 8
-
£2,046 GBP
View
B+
Retailer 9
-
£2,051 GBP
View
B+
Retailer 10
-
£2,072 GBP
View
Retailer 11
-
£2,090 GBP
View
Price last confirmed 8 days ago
B+
Retailer 12
-
£2,090 GBP
View
B+
Retailer 13
-
£2,170 GBP
View
B+
Retailer 14
-
£2,195 GBP
View
B+
Retailer 15
-
£2,199 GBP
View
B+
Retailer 16
-
£2,279 GBP
View
B+
Retailer 17
-
£2,394 GBP
View
B+
Retailer 18
-
£2,412 GBP
View
B+
Retailer 19
-
£2,444 GBP
View
Retailer 20
-
£2,533 GBP
View
Price last confirmed 33 days ago
B+
Retailer 21
-
£2,551 GBP
View
B
Retailer 22
-
£3,083 GBP
View
B
Retailer 23
-
£3,170 GBP
View
B
Retailer 24
-
£3,651 GBP
View
Most Expensive
C
NZ Jewellers
ffbaecdc-c3de-48b0-9890-1cd15db27370 · Nov 5
£4,370 GBP
$5,881 USD
View
24 more retailers have this diamond
Prices start from £1,635 GBPSave up to £2,734 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
1.01ct Round
£1,635 GBP