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Round|Natural|GIA

12.39ct E SI1 Round Natural Diamond

EX • E/SI1 • GIA 2225192990

Certificate GIA 2225192990

Diamond specifications and retailer prices

From $445,566 AUD
HK$2,445,200 HKD
As of October 30, 2026
Save $224,340 AUD (33%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: $669,907 AUD at Yorxs · As of October 31, 2026
View at Yorxs

About this 12.39ct natural round diamond

This 12.39ct natural round sits in the over five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2225192990. Listed at 4 retailers as of October 30, 2026, with prices from $445,566 to $669,907, a $224,340 spread on the same certified stone. Yorxs lists it at $669,907. 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

12.39
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2225192990
Dimensions15.08 × 15.02 × 9.00 mm
L/W Ratio1.00
Star length55%
Lower girdle75%
Key to symbols
Crystal, Needle, Feather, Etch Channel
Top View
15.08 mm15.02 mm12.39 ctE / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2225192990
Side View
Table 60.0%Crown 34.5°Girdle: NUL-THNPavilion 41.2°Culet: NoneDepth 59.9%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: $584,365 AUD|Low: $445,566 AUD|High: $706,668 AUD|Avg: $545,215 AUD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
October 31, 2026
Retailer 3$445,566 AUD
Retailer 2$500,817 AUD
Retailer 4$515,923 AUD
Retailer 1$584,365 AUD
Yorxs$669,907 AUD

17 data points across 5 retailers

4 retailers$445,566 AUD to $669,907 AUD

A
Cheapest Retailer
-
$445,566 AUD
HK$2,445,200 HKD
Retailer 2
-
$500,817 AUD
SGD 475,400 SGD
View
Price last confirmed 22 days ago
B+
Retailer 3
-
$584,365 AUD
£323,216 GBP
View
Most Expensive
B+
Yorxs
S-1333 · Oct 31
$669,907 AUD
€448,164 EUR
View
3 more retailers have this diamond
Prices start from $445,566 AUDSave up to $224,340 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.

A
12.39ct Round
$445,566 AUD