Round|Natural|GIA

1.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 1242003683

Certificate GIA 1242003683

Diamond specifications and retailer prices

From £2,771 GBP
A$5,713 AUD
As of October 31, 2026
Save £807 GBP (23%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £3,579 GBP at Yorxs · As of October 30, 2026
View at Yorxs

About this 1.18ct natural round diamond

This 1.18ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1242003683. Listed at 2 retailers as of October 30, 2026, with prices from £2,771 to £3,579, a £807 spread on the same certified stone. Yorxs lists it at £3,579. 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

1.18
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1242003683
Dimensions6.81 × 6.83 × 4.14 mm
L/W Ratio1.00
Top View
6.81 mm6.83 mm1.18 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1242003683
Side View
Table 61.0%CrownGirdlePavilionCuletDepth 60.7%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 31
Current: £3,579 GBP|Low: £3,549 GBP|High: £3,579 GBP|Avg: £3,561 GBP|+0.6%
October 30, 2026
Yorxs£3,579 GBP

5 data points across 1 retailer

2 retailers£2,771 GBP to £3,579 GBP

B+
Cheapest Retailer
-
£2,771 GBP
A$5,713 AUD
Most Expensive
B
Yorxs
ARH2392-1 · Oct 30
£3,579 GBP
€4,567 EUR
View
1 more retailer has this diamond
Prices start from £2,771 GBPSave up to £807 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+
1.18ct Round
£2,771 GBP