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Round|Natural|IGI

3.81ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 610308387

Shape and cutting style on the report: Round brilliant

Certificate IGI 610308387

Diamond specifications and retailer prices

From £18,357 GBP
₹2,342,506 INR
As of November 1, 2026
Save £6,567 GBP (26%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £31,254 GBP at MOH London · As of October 1, 2026
View at MOH London

About this 3.81ct natural round diamond

This 3.81ct 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 IGI 610308387. Listed at 9 retailers as of October 31, 2026, with a 36% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

3.81
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.2°
OriginNatural
Grading LabIGI
CertificateIGI 610308387
Dimensions9.91 × 9.80 × 6.18 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
9.91 mm9.80 mm3.81 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 610308387
Side View
Table 56.0%Crown 36.4°Girdle: MED-STKPavilion 40.2°Culet: NoneDepth 62.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £31,254 GBP|Low: £18,319 GBP|High: £42,653 GBP|Avg: £23,140 GBP|+1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 2£18,357 GBP
Retailer 10£19,158 GBP
Retailer 9£19,580 GBP
Retailer 5£20,786 GBP
Retailer 8£21,826 GBP
Retailer 6£23,645 GBP
Retailer 7£24,555 GBP
Retailer 3£24,924 GBP
Retailer 4£25,157 GBP
MOH London£31,254 GBP

39 data points across 10 retailers

9 retailers£18,357 GBP to £24,924 GBP

A
Cheapest Retailer
-
£18,357 GBP
₹2,342,506 INR
Retailer 2
-
£19,158 GBP
$25,670 USD
View
Price last confirmed 35 days ago
Retailer 3
-
£20,598 GBP
$27,599 USD
View
Price last confirmed 34 days ago
Retailer 4
-
£22,918 GBP
$30,708 USD
View
Price last confirmed 33 days ago
Retailer 5
-
£23,645 GBP
$31,682 USD
View
Price last confirmed 31 days ago
Retailer 6
-
£24,555 GBP
$32,901 USD
View
Price last confirmed 33 days ago
A
Retailer 7
-
£24,924 GBP
€31,805 EUR
View
Retailer 8
-
£25,157 GBP
ZAR 544,560 ZAR
View
Price last confirmed 31 days ago
Most Expensive
MOH London
27E1CBE0E · Oct 1
£31,254 GBP
View
Price last confirmed 31 days ago
8 more retailers have this diamond
Prices start from £18,357 GBPSave up to £6,567 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.

A
3.81ct Round
£18,357 GBP