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3.86ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 6355040137

Shape and cutting style on the report: Round brilliant

Certificate GIA 6355040137

Diamond specifications and retailer prices

From £34,548 GBP
$46,290 USD
As of November 1, 2026
Save £17,578 GBP (34%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £52,126 GBP at Cape Diamonds · As of October 27, 2026
View at Cape Diamonds

About this 3.86ct natural round diamond

This 3.86ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6355040137. Listed at 9 retailers as of October 27, 2026, with prices from £34,548 to £52,126, a £17,578 spread on the same certified stone. Cape Diamonds lists it at £52,126. 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

3.86
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 6355040137
Dimensions9.97 × 9.92 × 6.23 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
9.97 mm9.92 mm3.86 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6355040137
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.6%

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: Nov 1
Current: £52,126 GBP|Low: £34,548 GBP|High: £52,126 GBP|Avg: £41,256 GBP|+1.6%
Cape Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 6£34,548 GBP
Retailer 7£35,227 GBP
Retailer 2£36,576 GBP
Retailer 5£39,203 GBP
Retailer 4£43,784 GBP
Retailer 3£47,355 GBP
Cape Diamonds£52,126 GBP

43 data points across 7 retailers

9 retailers£34,548 GBP to £52,126 GBP

B+
Cheapest Retailer
-
£34,548 GBP
$46,290 USD
B+
Retailer 2
-
£35,227 GBP
$47,200 USD
View
B+
Retailer 3
-
£36,576 GBP
₹4,667,443 INR
View
B+
Retailer 4
-
£37,046 GBP
$49,638 USD
View
B
Retailer 5
-
£39,203 GBP
$52,528 USD
View
Retailer 6
-
£39,203 GBP
$52,528 USD
View
Price last confirmed 18 days ago
B
Retailer 7
-
£43,784 GBP
View
B
Retailer 8
-
£47,355 GBP
€60,429 EUR
View
Most Expensive
B
Cape Diamonds
cert_6355040137 · Oct 27
£52,126 GBP
ZAR 1,128,319 ZAR
View
8 more retailers have this diamond
Prices start from £34,548 GBPSave up to £17,578 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+
3.86ct Round
£34,548 GBP