Round|Natural|GIA

1.00ct G SI1 Round Natural Diamond

EX • G/SI1 • GIA 5553372344

Certificate GIA 5553372344

Diamond specifications and retailer prices

From £1,788 GBP
As of November 5, 2026
Save £1,091 GBP (38%) vs most expensive(unlock to see where)
28 retailers carry this diamond
Most expensive: £4,176 GBP at NZ Jewellers · As of October 9, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5553372344. Listed at 28 retailers as of November 5, 2026, with a 61% 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
G
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 5553372344
Dimensions6.40 × 6.35 × 3.99 mm
L/W Ratio1.01
Star length50%
Culet sizeNone
Key to symbols
Cloud, Crystal, Needle
Top View
6.40 mm6.35 mm1.00 ctG / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553372344
Side View
Table 58.0%Crown 34.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.6%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £4,176 GBP|Low: £1,594 GBP|High: £4,859 GBP|Avg: £2,466 GBP
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
Retailer 20
Retailer 21
Retailer 22
Retailer 23
November 6, 2026
Retailer 8£1,594 GBP
Retailer 7£1,668 GBP
Retailer 3£1,788 GBP
Retailer 15£1,820 GBP
Retailer 11£1,835 GBP
Retailer 9£1,846 GBP
Retailer 12£1,879 GBP
Retailer 21£1,973 GBP
Retailer 14£2,061 GBP
Retailer 18£2,092 GBP
Retailer 13£2,256 GBP
Retailer 4£2,309 GBP
Retailer 10£2,378 GBP
Retailer 19£2,425 GBP
Retailer 5£2,430 GBP
Retailer 23£2,430 GBP
Retailer 17£2,511 GBP
Retailer 20£2,584 GBP
Retailer 16£2,731 GBP
Retailer 2£2,797 GBP
Retailer 22£2,878 GBP
Retailer 6£3,825 GBP
NZ Jewellers£4,176 GBP

19 data points across 23 retailers

28 retailers£1,788 GBP to £2,878 GBP

Retailer 1
-
£1,594 GBP
Price last confirmed 9 days ago
Retailer 2
-
£1,668 GBP
View
Price last confirmed 8 days ago
A
Retailer 3
-
£1,788 GBP
View
Retailer 4
-
£1,820 GBP
View
Price last confirmed 16 days ago
Retailer 5
-
£1,835 GBP
View
Price last confirmed 11 days ago
Retailer 6
-
£1,846 GBP
View
Price last confirmed 9 days ago
Retailer 7
-
£1,879 GBP
View
Price last confirmed 10 days ago
A
Retailer 8
-
£1,973 GBP
View
Final sale: no returns
Retailer 9
-
£2,061 GBP
View
Price last confirmed 12 days ago
Retailer 10
-
£2,061 GBP
View
Price last confirmed 11 days ago
B+
Retailer 11
-
£2,092 GBP
View
Retailer 12
-
£2,141 GBP
View
Price last confirmed 12 days ago
Retailer 13
-
£2,171 GBP
View
Price last confirmed 25 days ago
Retailer 14
-
£2,171 GBP
View
Price last confirmed 28 days ago
B+
Retailer 15
-
£2,256 GBP
View
B+
Retailer 16
-
£2,309 GBP
View
Retailer 17
-
£2,378 GBP
View
Price last confirmed 10 days ago
B+
Retailer 18
-
£2,425 GBP
View
B+
Retailer 19
-
£2,430 GBP
View
B+
Retailer 20
-
£2,430 GBP
View
Retailer 21
-
£2,505 GBP
View
Price last confirmed 28 days ago
B+
Retailer 22
-
£2,511 GBP
View
B+
Retailer 23
-
£2,584 GBP
View
Retailer 24
-
£2,731 GBP
View
Price last confirmed 24 days ago
Retailer 25
-
£2,797 GBP
View
B+
Retailer 26
-
£2,878 GBP
View
Retailer 27
-
£3,825 GBP
View
Price last confirmed 8 days ago
Most Expensive
NZ Jewellers
be185f9c-4bed-42f0-a803-0f81cb0430b9 · Oct 9
£4,176 GBP
$5,620 USD
View
Price last confirmed 28 days ago
27 more retailers have this diamond
Prices start from £1,788 GBPSave up to £1,091 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
£1,788 GBP