Round|Natural|GIA

3.99ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 6221251339

Certificate GIA 6221251339

Diamond specifications and retailer prices

From £53,102 GBP
$70,715 USD
As of October 29, 2026
Save £16,711 GBP (24%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £93,185 GBP at MOH London · As of October 8, 2026
View at MOH London

About this 3.99ct natural round diamond

This 3.99ct natural round sits in the three to five carat band, graded E colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6221251339. Listed at 19 retailers as of October 29, 2026, with a 31% 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

3.99
Carat
E
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6221251339
Dimensions10.32 × 10.29 × 6.19 mm
L/W Ratio1.00
Top View
10.32 mm10.29 mm3.99 ctE / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6221251339
Side View
Table 58.0%CrownGirdle: MediumPavilionCulet: NoneDepth 60.2%

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: Oct 29
Current: £93,185 GBP|Low: £52,606 GBP|High: £93,432 GBP|Avg: £63,257 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 29, 2026
Retailer 5£53,370 GBP
Retailer 4£53,740 GBP
Retailer 8£54,186 GBP
Retailer 7£56,267 GBP
Retailer 9£63,245 GBP
Retailer 3£63,415 GBP
Retailer 6£65,756 GBP
Retailer 2£69,813 GBP
MOH London£93,185 GBP

37 data points across 9 retailers

19 retailers£53,102 GBP to £69,813 GBP

B+
Cheapest Retailer
-
£53,102 GBP
$70,715 USD
B+
Retailer 2
-
£53,370 GBP
$71,073 USD
View
B+
Retailer 3
-
£53,570 GBP
$71,338 USD
View
Price last confirmed 24 days ago
B+
Retailer 4
-
£53,740 GBP
₹6,815,644 INR
View
B+
Retailer 5
-
£55,953 GBP
$74,511 USD
View
B+
Retailer 6
-
£56,267 GBP
$74,930 USD
View
B+
Retailer 7
-
£59,112 GBP
$78,719 USD
View
Price last confirmed 21 days ago
B
Retailer 8
-
£60,893 GBP
$81,090 USD
View
B
Retailer 9
-
£60,893 GBP
$81,090 USD
View
B
Retailer 10
-
£61,576 GBP
$81,999 USD
View
Price last confirmed 32 days ago
B
Retailer 11
-
£61,576 GBP
$81,999 USD
View
Price last confirmed 29 days ago
B
Retailer 12
-
£62,920 GBP
$83,790 USD
View
B
Retailer 13
-
£63,245 GBP
$84,222 USD
View
Price last confirmed 22 days ago
B
Retailer 14
-
£63,415 GBP
View
B
Retailer 15
-
£64,039 GBP
$85,279 USD
View
Price last confirmed 21 days ago
B
Retailer 16
-
£65,756 GBP
$87,566 USD
View
B
Retailer 17
-
£66,502 GBP
$88,559 USD
View
Price last confirmed 29 days ago
B
Retailer 18
-
£69,813 GBP
€88,542 EUR
View
Most Expensive
B
MOH London
7A1AA332B · Oct 8
£93,185 GBP
View
Price last confirmed 21 days ago
18 more retailers have this diamond
Prices start from £53,102 GBPSave up to £16,711 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+
3.99ct Round
£53,102 GBP