Round|Natural|GIA

3.99ct E SI2 Round Natural Diamond

EX • E/SI2 • GIA 6221251339

Certificate GIA 6221251339

Diamond specifications and retailer prices

From $100,656 AUD
$70,715 USD
As of October 29, 2026
Save $31,676 AUD (24%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $176,634 AUD 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: $176,634 AUD|Low: $99,715 AUD|High: $177,102 AUD|Avg: $119,904 AUD|-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$101,165 AUD
Retailer 4$101,865 AUD
Retailer 8$102,711 AUD
Retailer 7$106,656 AUD
Retailer 9$119,881 AUD
Retailer 3$120,204 AUD
Retailer 6$124,642 AUD
Retailer 2$132,332 AUD
MOH London$176,634 AUD

37 data points across 9 retailers

19 retailers$100,656 AUD to $132,332 AUD

B+
Cheapest Retailer
-
$100,656 AUD
$70,715 USD
B+
Retailer 2
-
$101,165 AUD
$71,073 USD
View
Retailer 3
-
$101,543 AUD
$71,338 USD
View
Price last confirmed 24 days ago
B+
Retailer 4
-
$101,865 AUD
₹6,815,644 INR
View
B+
Retailer 5
-
$106,059 AUD
$74,511 USD
View
B+
Retailer 6
-
$106,656 AUD
$74,930 USD
View
Retailer 7
-
$112,049 AUD
$78,719 USD
View
Price last confirmed 21 days ago
B
Retailer 8
-
$115,424 AUD
$81,090 USD
View
B
Retailer 9
-
$115,424 AUD
$81,090 USD
View
Retailer 10
-
$116,717 AUD
$81,999 USD
View
Price last confirmed 32 days ago
Retailer 11
-
$116,717 AUD
$81,999 USD
View
Price last confirmed 30 days ago
B
Retailer 12
-
$119,267 AUD
$83,790 USD
View
Retailer 13
-
$119,881 AUD
$84,222 USD
View
Price last confirmed 22 days ago
B
Retailer 14
-
$120,204 AUD
£66,495 GBP
View
Retailer 15
-
$121,386 AUD
$85,279 USD
View
Price last confirmed 22 days ago
B
Retailer 16
-
$124,642 AUD
$87,566 USD
View
Retailer 17
-
$126,055 AUD
$88,559 USD
View
Price last confirmed 30 days ago
B
Retailer 18
-
$132,332 AUD
€88,542 EUR
View
Most Expensive
MOH London
7A1AA332B · Oct 8
$176,634 AUD
£97,711 GBP
View
Price last confirmed 21 days ago
18 more retailers have this diamond
Prices start from $100,656 AUDSave up to $31,676 AUD

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
$100,656 AUD