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Round|Natural|GIA

3.18ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6401889391

Certificate GIA 6401889391

Diamond specifications and retailer prices

From £44,209 GBP
As of November 6, 2026
Save £4,038 GBP (8%) vs most expensive(unlock to see where)
3 retailers carry this diamond
Most expensive: £48,247 GBP at Yorxs · As of November 6, 2026
View at Yorxs

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 6401889391. Listed at 3 retailers as of November 6, 2026, with a relatively tight 9% 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
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6401889391
Dimensions9.30 × 9.36 × 5.83 mm
L/W Ratio1.01
Top View
9.30 mm9.36 mm3.18 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6401889391
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 62.4%

Caratlytics Score

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

Price History

Last verified: Nov 6
Current: £44,209 GBP|Low: £36,833 GBP|High: £64,375 GBP|Avg: £44,885 GBP|+6.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Yorxs
November 6, 2026
Retailer 8£36,833 GBP
Retailer 6£39,700 GBP
Retailer 4£40,049 GBP
Retailer 3£40,768 GBP
Retailer 7£43,849 GBP
Retailer 1£44,209 GBP
Retailer 5£45,947 GBP
Yorxs£48,247 GBP
Retailer 2£64,375 GBP

39 data points across 9 retailers

3 retailers£44,209 GBP to £48,247 GBP

Retailer 1
-
£36,833 GBP
Price last confirmed 45 days ago
B+
Retailer 2
-
£44,209 GBP
View
Most Expensive
B
Yorxs
MC 5035 · Nov 6
£48,247 GBP
€61,844 EUR
View
2 more retailers have this diamond
Prices start from £44,209 GBPSave up to £4,038 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
£44,209 GBP