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Round|Natural|GIA

1.00ct H SI2 Round Natural Diamond

VG • H/SI2 • GIA 2436407019

Certificate GIA 2436407019

Diamond specifications and retailer prices

From £1,356 GBP
As of November 5, 2026
Save £2,565 GBP (65%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £3,921 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 H colour (near-colourless) and SI2 clarity (slightly-included), with a very-good cut grade and certified by GIA 2436407019. Listed at 19 retailers as of November 5, 2026, with prices from £1,356 to £3,921, a £2,565 spread on the same certified stone. NZ Jewellers lists it at £3,921. 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

1.00
Carat
H
Colour
SI2
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34°
Pavilion angle40.4°
OriginNatural
Grading LabGIA
CertificateGIA 2436407019
Dimensions6.39 × 6.32 × 3.89 mm
L/W Ratio1.01
Top View
6.39 mm6.32 mm1.00 ctH / SI2
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2436407019
Side View
Table 59.0%Crown 34°Girdle: MED-THKPavilion 40.4°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 5
Current: £1,745 GBP|Low: £1,356 GBP|High: £3,320 GBP|Avg: £1,925 GBP|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 4£1,356 GBP
Retailer 7£1,369 GBP
Retailer 9£1,730 GBP
Retailer 8£1,744 GBP
Retailer 1£1,745 GBP
Retailer 2£1,907 GBP
Retailer 3£1,973 GBP
Retailer 5£2,114 GBP
Retailer 6£3,286 GBP

31 data points across 9 retailers

19 retailers£1,356 GBP to £3,921 GBP

A
Cheapest Retailer
-
£1,356 GBP
A
Retailer 2
-
£1,369 GBP
View
B+
Retailer 3
-
£1,659 GBP
View
B+
Retailer 4
-
£1,730 GBP
View
Final sale: no returns
B+
Retailer 5
-
£1,744 GBP
View
B+
Retailer 6
-
£1,745 GBP
View
Retailer 7
-
£1,782 GBP
View
Price last confirmed 109 days ago
B+
Retailer 8
-
£1,875 GBP
View
B+
Retailer 9
-
£1,907 GBP
View
B+
Retailer 10
-
£1,961 GBP
View
B+
Retailer 11
-
£1,973 GBP
View
B+
Retailer 12
-
£1,979 GBP
View
B+
Retailer 13
-
£2,031 GBP
View
B+
Retailer 14
-
£2,114 GBP
View
B
Retailer 15
-
£2,164 GBP
View
B
Retailer 16
-
£2,785 GBP
View
B
Retailer 17
-
£3,286 GBP
View
B
Retailer 18
-
£3,553 GBP
View
Most Expensive
C
NZ Jewellers
2c76cae2-ae71-494a-8465-77ecad09c201 · Nov 5
£3,921 GBP
$5,277 USD
View
18 more retailers have this diamond
Prices start from £1,356 GBPSave up to £2,565 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
£1,356 GBP