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Round|Natural|GIA

1.20ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 2554430101

Certificate GIA 2554430101

Diamond specifications and retailer prices

From $3,925 AUD
As of November 6, 2026
Save $4,503 AUD (53%) vs most expensive(unlock to see where)
27 retailers carry this diamond
Most expensive: $9,020 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 SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554430101. Listed at 27 retailers as of November 5, 2026, with a 115% 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
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2554430101
Dimensions6.75 × 6.72 × 4.22 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.75 mm6.72 mm1.20 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554430101
Side View
Table 58.0%Crown 36°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.7%

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: $9,020 AUD|Low: $3,708 AUD|High: $9,020 AUD|Avg: $5,724 AUD|+2.7%
Queensmith
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4$3,925 AUD
Retailer 3$4,045 AUD
Retailer 9$4,384 AUD
Retailer 5$4,502 AUD
Retailer 10$4,788 AUD
Retailer 12$4,788 AUD
Retailer 6$4,945 AUD
Retailer 11$4,948 AUD
Retailer 7$5,628 AUD
Retailer 2$5,651 AUD
Retailer 8$8,069 AUD
Queensmith$9,020 AUD

37 data points across 12 retailers

27 retailers$3,925 AUD to $8,428 AUD

A
Cheapest Retailer
-
$3,925 AUD
A
Retailer 2
-
$3,959 AUD
View
A
Retailer 3
-
$4,045 AUD
View
Final sale: no returns
Retailer 4
-
$4,384 AUD
View
Price last confirmed 8 days ago
Retailer 5
-
$4,384 AUD
View
Price last confirmed 49 days ago
Retailer 6
-
$4,384 AUD
View
Price last confirmed 29 days ago
Retailer 7
-
$4,384 AUD
View
Price last confirmed 15 days ago
Retailer 8
-
$4,384 AUD
View
Price last confirmed 29 days ago
B+
Retailer 9
-
$4,419 AUD
View
B+
Retailer 10
-
$4,502 AUD
View
Retailer 11
-
$4,551 AUD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$4,788 AUD
View
B+
Retailer 13
-
$4,788 AUD
View
B+
Retailer 14
-
$4,945 AUD
View
B+
Retailer 15
-
$4,948 AUD
View
Retailer 16
-
$5,058 AUD
View
Price last confirmed 28 days ago
Retailer 17
-
$5,058 AUD
View
Price last confirmed 45 days ago
B+
Retailer 18
-
$5,058 AUD
View
Retailer 19
-
$5,611 AUD
View
Price last confirmed 24 days ago
B+
Retailer 20
-
$5,628 AUD
View
B
Retailer 21
-
$5,651 AUD
View
B
Retailer 22
-
$8,069 AUD
View
B
Retailer 23
-
$8,428 AUD
View
Retailer 24
-
$8,428 AUD
View
Price last confirmed 39 days ago
Retailer 25
-
$8,428 AUD
View
Price last confirmed 48 days ago
Retailer 26
-
$8,428 AUD
View
Price last confirmed 17 days ago
Most Expensive
Queensmith
2554430101 · Oct 28
$9,020 AUD
£4,880 GBP
View
Price last confirmed 9 days ago
26 more retailers have this diamond
Prices start from $3,925 AUDSave up to $4,503 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
$3,925 AUD