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Round|Natural|GIA

1.28ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 2247034235

Certificate GIA 2247034235

Diamond specifications and retailer prices

From $5,161 AUD
As of November 5, 2026
Save $2,192 AUD (30%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $12,233 AUD at NZ Jewellers · As of September 27, 2026
View at NZ Jewellers

About this 1.28ct natural round diamond

This 1.28ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2247034235. Listed at 20 retailers as of November 5, 2026, with a 42% 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

1.28
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 2247034235
Dimensions6.92 × 6.88 × 4.35 mm
L/W Ratio1.01
Top View
6.92 mm6.88 mm1.28 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2247034235
Side View
Table 57.0%CrownGirdle: Sli. ThickPavilionCulet: NoneDepth 63.2%

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 5
Current: $7,353 AUD|Low: $4,929 AUD|High: $11,317 AUD|Avg: $6,803 AUD|+11.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
Retailer 16
Retailer 17
November 6, 2026
Retailer 9$5,161 AUD
Retailer 16$5,382 AUD
Retailer 11$5,443 AUD
Retailer 7$5,596 AUD
Retailer 15$5,864 AUD
Retailer 5$6,033 AUD
Retailer 6$6,325 AUD
Retailer 13$6,514 AUD
Retailer 8$6,739 AUD
Retailer 12$6,739 AUD
Retailer 17$6,971 AUD
Retailer 2$7,114 AUD
Retailer 10$7,216 AUD
Retailer 1$7,353 AUD
Retailer 4$7,751 AUD
Retailer 3$8,466 AUD
Retailer 14$11,287 AUD

38 data points across 17 retailers

20 retailers$5,161 AUD to $7,353 AUD

A
Cheapest Retailer
-
$5,161 AUD
B+
Retailer 2
-
$5,443 AUD
View
B+
Retailer 3
-
$5,472 AUD
View
B+
Retailer 4
-
$5,691 AUD
View
B+
Retailer 5
-
$5,864 AUD
View
Retailer 6
-
$6,362 AUD
View
Price last confirmed 30 days ago
Retailer 7
-
$6,362 AUD
View
Price last confirmed 30 days ago
Retailer 8
-
$6,362 AUD
View
Price last confirmed 39 days ago
B+
Retailer 9
-
$6,514 AUD
View
B
Retailer 10
-
$6,739 AUD
View
B
Retailer 11
-
$6,739 AUD
View
B
Retailer 12
-
$6,971 AUD
View
Retailer 13
-
$7,114 AUD
View
Price last confirmed 34 days ago
B
Retailer 14
-
$7,216 AUD
View
Retailer 15
-
$7,340 AUD
View
Price last confirmed 39 days ago
B+
Retailer 16
-
$7,353 AUD
View
Retailer 17
-
$7,751 AUD
View
Price last confirmed 30 days ago
Retailer 18
-
$8,466 AUD
View
Price last confirmed 38 days ago
Retailer 19
-
$11,287 AUD
View
Price last confirmed 30 days ago
Most Expensive
NZ Jewellers
55f578f1-354a-4ea5-8be4-20ec29b3a72f · Sep 27
$12,233 AUD
$8,405 USD
View
Price last confirmed 40 days ago
19 more retailers have this diamond
Prices start from $5,161 AUDSave up to $2,192 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
1.28ct Round
$5,161 AUD