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3.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 3569

Certificate GIA 3569

Diamond specifications and retailer prices

From £38,153 GBP
As of November 6, 2026
Save £5,566 GBP (13%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £43,718 GBP at Blue Nile · As of November 5, 2026
View at Blue Nile

About this 3.18ct natural round diamond

This 3.18ct natural round sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 3 retailers as of November 5, 2026, with a relatively tight 15% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

3.18
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 3569
Dimensions9.62 × 9.68 × 5.65 mm
L/W Ratio1.01
Top View
9.62 mm9.68 mm3.18 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 3569
Side View
Table 62.0%CrownGirdle: THN-MEDPavilionCulet: NoneDepth 58.5%

Caratlytics Score

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

Last verified: Nov 6
Current: £43,718 GBP|Low: £37,732 GBP|High: £43,718 GBP|Avg: £40,521 GBP
Blue Nile
Retailer 2
Retailer 3
September 23, 2026
Retailer 2£38,153 GBP
Retailer 3£40,109 GBP
Blue Nile£43,718 GBP

3 data points across 3 retailers

3 retailers£38,153 GBP to £43,718 GBP

B+
Cheapest Retailer
-
£38,153 GBP
B+
Retailer 2
-
£40,109 GBP
View
Most Expensive
B
Blue Nile
15486058 · Nov 5
£43,718 GBP
$58,841 USD
View
2 more retailers have this diamond
Prices start from £38,153 GBPSave up to £5,566 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+
3.18ct Round
£38,153 GBP