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Round|Natural|GIA

1.28ct K I1 Round Natural Diamond

EX • K/I1 • GIA 2121010513

Certificate GIA 2121010513

Diamond specifications and retailer prices

From $4,997 NZD
As of November 6, 2026
Save $913 NZD (15%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $5,910 NZD at Yorxs · As of November 5, 2026
View at Yorxs

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 K colour (faint-tinted) and I1 clarity (included), with a top-tier cut grade and certified by GIA 2121010513. Listed at 2 retailers as of November 5, 2026, with prices from $4,997 to $5,910, a $913 spread on the same certified stone. Yorxs lists it at $5,910. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.28
Carat
K
Colour
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2121010513
Dimensions7.01 × 7.04 × 4.28 mm
L/W Ratio1.00
Star length55%
Lower girdle75%
Girdle conditionTHIN TO MEDIUM
Top View
7.01 mm7.04 mm1.28 ctK / I1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 2121010513
Side View
Table 57.0%Crown 34.5°Girdle: THN-MEDPavilion 40.8°Culet: NoneDepth 60.9%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 6
Current: $4,997 NZD|Low: $3,028 NZD|High: $5,986 NZD|Avg: $4,092 NZD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 5, 2026
Retailer 3$3,028 NZD
Retailer 2$3,077 NZD
Retailer 4$3,885 NZD
Retailer 1$4,997 NZD
Yorxs$5,910 NZD

20 data points across 5 retailers

2 retailers$4,997 NZD to $5,910 NZD

B
Cheapest Retailer
-
$4,997 NZD
Most Expensive
B
Yorxs
620946214 · Nov 5
$5,910 NZD
€3,164 EUR
View
1 more retailer has this diamond
Prices start from $4,997 NZDSave up to $913 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.

B
1.28ct Round
$4,997 NZD