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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

VG • I/SI1 • GIA 2566053993

Certificate GIA 2566053993

Diamond specifications and retailer prices

From £1,156 GBP
HK$12,100 HKD
As of October 31, 2026
Save £2,058 GBP (64%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £3,214 GBP at NZ Jewellers · As of October 30, 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 very-good cut grade and certified by GIA 2566053993. Listed at 22 retailers as of October 30, 2026, with prices from £1,156 to £3,214, a £2,058 spread on the same certified stone. NZ Jewellers lists it at £3,214. 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
I
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle37.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2566053993
Dimensions6.17 × 6.24 × 4.01 mm
L/W Ratio1.01
Top View
6.17 mm6.24 mm1.00 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 2566053993
Side View
Table 59.0%Crown 37.5°Girdle: THN-THKPavilion 40.8°Culet: NoneDepth 64.7%

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 31
Current: £3,214 GBP|Low: £1,146 GBP|High: £3,340 GBP|Avg: £1,758 GBP|-3.8%
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
October 31, 2026
Retailer 13£1,156 GBP
Retailer 2£1,172 GBP
Retailer 21£1,370 GBP
Retailer 8£1,389 GBP
Retailer 19£1,483 GBP
Retailer 9£1,514 GBP
Retailer 4£1,537 GBP
Retailer 7£1,537 GBP
Retailer 3£1,560 GBP
Retailer 14£1,608 GBP
Retailer 12£1,610 GBP
Retailer 5£1,640 GBP
Retailer 17£1,677 GBP
Retailer 6£1,687 GBP
Retailer 11£1,773 GBP
Retailer 16£1,889 GBP
Retailer 18£2,100 GBP
Retailer 15£2,105 GBP
Retailer 10£2,240 GBP
Retailer 20£2,707 GBP
NZ Jewellers£3,214 GBP

17 data points across 21 retailers

22 retailers£1,156 GBP to £3,214 GBP

A
Cheapest Retailer
-
£1,156 GBP
HK$12,100 HKD
A
Retailer 2
-
£1,172 GBP
₹149,597 INR
View
A
Retailer 3
-
£1,389 GBP
$1,861 USD
View
Retailer 4
-
£1,470 GBP
$1,970 USD
View
Price last confirmed 12 days ago
A
Retailer 5
-
£1,483 GBP
View
A
Retailer 6
-
£1,514 GBP
$2,029 USD
View
A
Retailer 7
-
£1,537 GBP
$2,060 USD
View
A
Retailer 8
-
£1,537 GBP
$2,060 USD
View
B+
Retailer 9
-
£1,560 GBP
$2,090 USD
View
A
Retailer 10
-
£1,608 GBP
$2,155 USD
View
A
Retailer 11
-
£1,610 GBP
SGD 2,916 SGD
View
A
Retailer 12
-
£1,640 GBP
$2,198 USD
View
B+
Retailer 13
-
£1,677 GBP
View
A
Retailer 14
-
£1,687 GBP
$2,260 USD
View
B+
Retailer 15
-
£1,773 GBP
$2,376 USD
View
B+
Retailer 16
-
£1,889 GBP
ZAR 40,896 ZAR
View
Retailer 17
-
£2,007 GBP
A$4,137 AUD
View
Price last confirmed 24 days ago
B+
Retailer 18
-
£2,100 GBP
€2,680 EUR
View
B+
Retailer 19
-
£2,105 GBP
$2,820 USD
View
B+
Retailer 20
-
£2,240 GBP
$3,001 USD
View
B
Retailer 21
-
£2,707 GBP
View
Most Expensive
B
NZ Jewellers
d7dd0661-fee1-4ae8-a928-035d6a473d34 · Oct 30
£3,214 GBP
$4,306 USD
View
21 more retailers have this diamond
Prices start from £1,156 GBPSave up to £2,058 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
£1,156 GBP