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3.50ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 6502620752

Certificate GIA 6502620752

Diamond specifications and retailer prices

From £79,810 GBP
As of October 29, 2026
Save £2,729 GBP (3%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £82,539 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 3.5ct natural round diamond

This 3.5ct 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 6502620752. Listed at 2 retailers as of October 29, 2026, with a relatively tight 3% 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

3.50
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6502620752
Dimensions9.93 × 9.86 × 5.85 mm
L/W Ratio1.01
Star length45%
Lower girdle75%
Top View
9.93 mm9.86 mm3.50 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6502620752
Side View
Table 60.0%Crown 35°Girdle: THN-MEDPavilion 40.6°Culet: NoneDepth 59.1%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 29
Current: £57,440 GBP|Low: £33,815 GBP|High: £57,440 GBP|Avg: £41,690 GBP
Retailer 1
Retailer 2
December 25, 2025
Retailer 2£33,815 GBP
Retailer 1£57,440 GBP

2 data points across 2 retailers

2 retailers£79,810 GBP to £82,539 GBP

B
Cheapest Retailer
-
£79,810 GBP
Most Expensive
B
Diamond Quarter
3.5SI1D65526D2BN · Oct 29
£82,539 GBP
View
1 more retailer has this diamond
Prices start from £79,810 GBPSave up to £2,729 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
3.50ct Round
£79,810 GBP