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Round|Natural|GIA

1.03ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 1559557053

Certificate GIA 1559557053

Diamond specifications and retailer prices

From £2,345 GBP
$3,142 USD
As of October 28, 2026
Save £2,735 GBP (54%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £5,080 GBP at NZ Jewellers · As of October 27, 2026
View at NZ Jewellers

About this 1.03ct natural round diamond

This 1.03ct natural round sits in the classic one-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559557053. Listed at 17 retailers as of October 27, 2026, with prices from £2,345 to £5,080, a £2,735 spread on the same certified stone. NZ Jewellers lists it at £5,080. 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

1.03
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1559557053
Dimensions6.40 × 6.43 × 4.02 mm
L/W Ratio1.00
Girdle conditionSlightly Thick
Culet sizeNone
Key to symbols
Twinning Wisp, Crystal
Top View
6.40 mm6.43 mm1.03 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 1559557053
Side View
Table 58.0%Crown 36°Girdle: Slightly ThickPavilion 40.8°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 28
Current: £3,394 GBP|Low: £2,345 GBP|High: £4,934 GBP|Avg: £3,150 GBP|+17.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 9£2,345 GBP
Retailer 8£2,541 GBP
Retailer 10£2,641 GBP
Retailer 6£2,996 GBP
Retailer 7£3,126 GBP
Retailer 4£3,294 GBP
Retailer 2£3,301 GBP
Retailer 1£3,394 GBP
Retailer 5£3,550 GBP
Retailer 3£4,902 GBP

39 data points across 10 retailers

17 retailers£2,345 GBP to £5,080 GBP

B+
Cheapest Retailer
-
£2,345 GBP
$3,142 USD
Retailer 2
-
£2,541 GBP
$3,405 USD
View
Price last confirmed 5 days ago
Retailer 3
-
£2,641 GBP
$3,539 USD
View
Price last confirmed 8 days ago
Retailer 4
-
£2,641 GBP
$3,539 USD
View
Price last confirmed 7 days ago
Retailer 5
-
£2,641 GBP
$3,539 USD
View
Price last confirmed 52 days ago
Retailer 6
-
£2,743 GBP
$3,675 USD
View
Price last confirmed 8 days ago
B+
Retailer 7
-
£2,996 GBP
$4,014 USD
View
Retailer 8
-
£3,048 GBP
$4,084 USD
View
Price last confirmed 56 days ago
B+
Retailer 9
-
£3,048 GBP
$4,084 USD
View
Retailer 10
-
£3,126 GBP
A$6,444 AUD
View
Price last confirmed 29 days ago
B
Retailer 11
-
£3,294 GBP
€4,204 EUR
View
Retailer 12
-
£3,301 GBP
$4,423 USD
View
Price last confirmed 10 days ago
B
Retailer 13
-
£3,394 GBP
View
B
Retailer 14
-
£3,550 GBP
ZAR 76,853 ZAR
View
B
Retailer 15
-
£4,902 GBP
View
Retailer 16
-
£5,080 GBP
$6,806 USD
View
Price last confirmed 52 days ago
Most Expensive
B
NZ Jewellers
040bf454-6994-43d5-bf2a-fd6506d0bf8e · Oct 27
£5,080 GBP
$6,806 USD
View
16 more retailers have this diamond
Prices start from £2,345 GBPSave up to £2,735 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.

B+
1.03ct Round
£2,345 GBP