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Round|Natural|GIA

1.25ct I SI2 Round Natural Diamond

EX • I/SI2 • GIA 2554968005

Certificate GIA 2554968005

Diamond specifications and retailer prices

From $3,727 AUD
As of October 31, 2026
4 retailers carry this diamond
Most expensive: $8,318 AUD at NZ Jewellers · As of September 24, 2026
View at NZ Jewellers

About this 1.25ct natural round diamond

This 1.25ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2554968005. Listed at 4 retailers as of October 31, 2026. 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

1.25
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2554968005
Dimensions6.85 × 6.81 × 4.30 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.85 mm6.81 mm1.25 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2554968005
Side View
Table 57.0%Crown 35.5°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 62.9%

Caratlytics Score

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

Price History

Last verified: Oct 31
Current: $4,911 AUD|Low: $2,970 AUD|High: $7,094 AUD|Avg: $3,997 AUD
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
October 5, 2026
Retailer 6$2,970 AUD
Retailer 11$3,056 AUD
Retailer 12$3,096 AUD
Retailer 2$3,130 AUD
Retailer 15$3,426 AUD
Retailer 3$3,559 AUD
Retailer 4$3,727 AUD
Retailer 10$3,728 AUD
Retailer 5$3,999 AUD
Retailer 7$4,045 AUD
Retailer 9$4,697 AUD
Retailer 8$4,741 AUD
Retailer 1$4,911 AUD
Retailer 14$5,878 AUD
Retailer 13$7,046 AUD

13 data points across 15 retailers

4 retailers

Retailer 1
-
$2,970 AUD
HK$16,300 HKD
Price last confirmed 57 days ago
Retailer 2
-
$3,559 AUD
$2,500 USD
View
Price last confirmed 37 days ago
A
Retailer 3
-
$3,727 AUD
View
Most Expensive
NZ Jewellers
546606c2-452f-4145-b796-905409c33598 · Sep 24
$8,318 AUD
$5,843 USD
View
Price last confirmed 38 days ago
3 more retailers have this diamond
Prices start from $3,727 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
1.25ct Round
$3,727 AUD