Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6445352304

Certificate GIA 6445352304

Diamond specifications and retailer prices

From £1,749 GBP
$2,344 USD
As of October 30, 2026
Save £2,050 GBP (54%) vs most expensive(unlock to see where)
25 retailers carry this diamond
Most expensive: £3,936 GBP at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6445352304. Listed at 25 retailers as of October 29, 2026, with a 117% 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
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6445352304
Dimensions6.40 × 6.34 × 3.93 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.40 mm6.34 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6445352304
Side View
Table 57.0%Crown 34.5°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.0%

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: Oct 30
Current: £2,777 GBP|Low: £1,629 GBP|High: £3,825 GBP|Avg: £2,474 GBP|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9£1,833 GBP
Retailer 8£1,881 GBP
Retailer 10£1,889 GBP
Retailer 4£2,181 GBP
Retailer 6£2,321 GBP
Retailer 3£2,402 GBP
Retailer 2£2,414 GBP
Retailer 5£2,494 GBP
Retailer 1£2,777 GBP
Retailer 7£3,799 GBP

35 data points across 10 retailers

25 retailers£1,749 GBP to £3,799 GBP

A
Cheapest Retailer
-
£1,749 GBP
$2,344 USD
Retailer 2
-
£1,767 GBP
$2,367 USD
View
Price last confirmed 76 days ago
B+
Retailer 3
-
£1,796 GBP
$2,406 USD
View
B+
Retailer 4
-
£1,833 GBP
$2,456 USD
View
B+
Retailer 5
-
£1,881 GBP
$2,520 USD
View
B+
Retailer 6
-
£1,889 GBP
$2,531 USD
View
Final sale: no returns
B+
Retailer 7
-
£1,897 GBP
A$3,910 AUD
View
B+
Retailer 8
-
£2,011 GBP
$2,695 USD
View
Retailer 9
-
£2,047 GBP
$2,743 USD
View
Price last confirmed 19 days ago
Retailer 10
-
£2,047 GBP
$2,743 USD
View
Price last confirmed 22 days ago
B+
Retailer 11
-
£2,073 GBP
$2,777 USD
View
Retailer 12
-
£2,126 GBP
$2,848 USD
View
Price last confirmed 16 days ago
B+
Retailer 13
-
£2,181 GBP
View
B
Retailer 14
-
£2,321 GBP
$3,110 USD
View
B
Retailer 15
-
£2,336 GBP
$3,130 USD
View
B
Retailer 16
-
£2,336 GBP
$3,130 USD
View
Retailer 17
-
£2,362 GBP
$3,165 USD
View
Price last confirmed 22 days ago
B
Retailer 18
-
£2,402 GBP
View
B
Retailer 19
-
£2,411 GBP
$3,230 USD
View
Retailer 20
-
£2,414 GBP
A$4,976 AUD
View
Price last confirmed 23 days ago
B
Retailer 21
-
£2,494 GBP
€3,183 EUR
View
Retailer 22
-
£2,623 GBP
$3,515 USD
View
Price last confirmed 16 days ago
B
Retailer 23
-
£2,777 GBP
ZAR 60,116 ZAR
View
B
Retailer 24
-
£3,799 GBP
View
Most Expensive
NZ Jewellers
5b7c1452-920d-407a-a1bd-0f029b656fa7 · Sep 27
£3,936 GBP
$5,274 USD
View
Price last confirmed 34 days ago
24 more retailers have this diamond
Prices start from £1,749 GBPSave up to £2,050 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
£1,749 GBP