Round|Natural|GIA

1.20ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 2538469749

Certificate GIA 2538469749

Diamond specifications and retailer prices

From $4,098 AUD
As of November 6, 2026
Save $4,812 AUD (54%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $9,417 AUD at Queensmith · As of October 28, 2026
View at Queensmith

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2538469749. Listed at 22 retailers as of November 2, 2026, with a 117% 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

1.20
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2538469749
Dimensions6.85 × 6.81 × 4.21 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.85 mm6.81 mm1.20 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2538469749
Side View
Table 59.0%Crown 33.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 61.6%

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: Nov 6
Current: $9,417 AUD|Low: $4,098 AUD|High: $9,454 AUD|Avg: $6,058 AUD|+2.2%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 5, 2026
Retailer 9$4,098 AUD
Retailer 6$4,280 AUD
Retailer 2$4,784 AUD
Retailer 3$4,820 AUD
Retailer 10$4,916 AUD
Retailer 5$5,533 AUD
Retailer 11$5,707 AUD
Retailer 4$6,212 AUD
Retailer 8$6,548 AUD
Retailer 7$8,910 AUD
Queensmith$9,417 AUD

33 data points across 11 retailers

22 retailers$4,098 AUD to $8,910 AUD

A
Cheapest Retailer
-
$4,098 AUD
A
Retailer 2
-
$4,280 AUD
View
B+
Retailer 3
-
$4,784 AUD
View
B+
Retailer 4
-
$4,820 AUD
View
Retailer 5
-
$4,865 AUD
View
Price last confirmed 9 days ago
B+
Retailer 6
-
$4,916 AUD
View
Final sale: no returns
B+
Retailer 7
-
$4,993 AUD
View
B+
Retailer 8
-
$4,999 AUD
View
Retailer 9
-
$5,172 AUD
View
Price last confirmed 11 days ago
Retailer 10
-
$5,328 AUD
View
Price last confirmed 26 days ago
Retailer 11
-
$5,328 AUD
View
Price last confirmed 40 days ago
B+
Retailer 12
-
$5,341 AUD
View
B+
Retailer 13
-
$5,533 AUD
View
B
Retailer 14
-
$5,539 AUD
View
Retailer 15
-
$5,707 AUD
View
Price last confirmed 30 days ago
Retailer 16
-
$6,148 AUD
View
Price last confirmed 39 days ago
B+
Retailer 17
-
$6,212 AUD
View
B
Retailer 18
-
$6,548 AUD
View
B
Retailer 19
-
$8,910 AUD
View
Retailer 20
-
$9,283 AUD
View
Price last confirmed 35 days ago
Retailer 21
-
$9,283 AUD
View
Price last confirmed 42 days ago
Most Expensive
Queensmith
2538469749 · Oct 28
$9,417 AUD
£5,095 GBP
View
Price last confirmed 9 days ago
21 more retailers have this diamond
Prices start from $4,098 AUDSave up to $4,812 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
1.20ct Round
$4,098 AUD