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Round|Natural|GIA

1.25ct K I1 Round Natural Diamond

EX • K/I1 • GIA 1428549226

Certificate GIA 1428549226

Diamond specifications and retailer prices

From $2,588 NZD
As of November 4, 2026
Save $1,807 NZD (41%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: $7,913 NZD at NZ Jewellers · As of September 28, 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 K colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 1428549226. Listed at 8 retailers as of November 4, 2026, with a 70% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.25
Carat
K
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle36°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1428549226
Dimensions6.86 × 6.82 × 4.33 mm
L/W Ratio1.01
Star length55%
Lower girdle75%
Culet sizeNone
Top View
6.86 mm6.82 mm1.25 ctK / I1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateGIA 1428549226
Side View
Table 56.0%Crown 36°Girdle: THN-STKPavilion 41.2°Culet: NoneDepth 63.3%

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 4
Current: $4,396 NZD|Low: $2,588 NZD|High: $4,419 NZD|Avg: $3,142 NZD|+1.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 5, 2026
Retailer 2$2,588 NZD
Retailer 9$2,610 NZD
Retailer 4$2,725 NZD
Retailer 3$2,912 NZD
Retailer 6$2,939 NZD
Retailer 5$3,074 NZD
Retailer 8$3,174 NZD
Retailer 7$3,860 NZD
Retailer 1$4,396 NZD

13 data points across 9 retailers

8 retailers$2,588 NZD to $4,396 NZD

A
Cheapest Retailer
-
$2,588 NZD
B+
Retailer 2
-
$2,725 NZD
View
B+
Retailer 3
-
$2,912 NZD
View
Retailer 4
-
$2,939 NZD
View
Price last confirmed 36 days ago
B+
Retailer 5
-
$3,174 NZD
View
Retailer 6
-
$3,391 NZD
View
Price last confirmed 38 days ago
B+
Retailer 7
-
$4,396 NZD
View
Most Expensive
NZ Jewellers
6ad9d6b3-af9c-4b84-8c1e-10dbdd6cf29b · Sep 28
$7,913 NZD
$4,448 USD
View
Price last confirmed 39 days ago
7 more retailers have this diamond
Prices start from $2,588 NZDSave up to $1,807 NZD

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
$2,588 NZD