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Round|Natural|GIA

1.00ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1558936352

Certificate GIA 1558936352

Diamond specifications and retailer prices

From £1,304 GBP
₹166,409 INR
As of October 31, 2026
Save £2,686 GBP (67%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £3,990 GBP at Quality Diamonds UK · As of October 30, 2026
View at Quality Diamonds UK

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 1558936352. Listed at 12 retailers as of October 30, 2026, with prices from £1,304 to £3,990, a £2,686 spread on the same certified stone. Quality Diamonds UK lists it at £3,990. 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
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 1558936352
Dimensions6.35 × 6.40 × 4.01 mm
L/W Ratio1.01
Culet sizeNone
Top View
6.35 mm6.40 mm1.00 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1558936352
Side View
Table 55.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 62.9%

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: £3,990 GBP|Low: £1,304 GBP|High: £3,990 GBP|Avg: £1,979 GBP
Quality Diamonds UK
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 31, 2026
Retailer 2£1,304 GBP
Retailer 4£1,608 GBP
Retailer 3£1,791 GBP
Retailer 10£1,885 GBP
Retailer 12£2,023 GBP
Retailer 11£2,113 GBP
Retailer 6£2,151 GBP
Retailer 7£3,231 GBP
Retailer 9£3,312 GBP
Retailer 5£3,385 GBP
Retailer 8£3,463 GBP
Quality Diamonds UK£3,990 GBP

41 data points across 12 retailers

12 retailers£1,304 GBP to £3,990 GBP

A
Cheapest Retailer
-
£1,304 GBP
₹166,409 INR
Retailer 2
-
£1,608 GBP
$2,155 USD
View
Price last confirmed 13 days ago
B+
Retailer 3
-
£1,791 GBP
$2,400 USD
View
B+
Retailer 4
-
£1,885 GBP
$2,526 USD
View
B+
Retailer 5
-
£2,023 GBP
€2,581 EUR
View
B+
Retailer 6
-
£2,113 GBP
ZAR 45,730 ZAR
View
B+
Retailer 7
-
£2,151 GBP
View
B
Retailer 8
-
£3,231 GBP
$4,329 USD
View
B
Retailer 9
-
£3,312 GBP
$4,438 USD
View
Final sale: no returns
B
Retailer 10
-
£3,385 GBP
$4,535 USD
View
B
Retailer 11
-
£3,463 GBP
View
Most Expensive
B
Quality Diamonds UK
133/1A7257153 · Oct 30
£3,990 GBP
View
11 more retailers have this diamond
Prices start from £1,304 GBPSave up to £2,686 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
£1,304 GBP