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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 $3,588 SGD
As of November 6, 2026
Save $656 SGD (15%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $4,243 SGD 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 $3,588 to $4,243, a $656 spread on the same certified stone. Yorxs lists it at $4,243. 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: $3,588 SGD|Low: $2,174 SGD|High: $4,298 SGD|Avg: $2,938 SGD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 5, 2026
Retailer 3$2,174 SGD
Retailer 2$2,210 SGD
Retailer 4$2,790 SGD
Retailer 1$3,588 SGD
Yorxs$4,243 SGD

20 data points across 5 retailers

2 retailers$3,588 SGD to $4,243 SGD

B
Cheapest Retailer
-
$3,588 SGD
Most Expensive
B
Yorxs
620946214 · Nov 5
$4,243 SGD
€3,164 EUR
View
1 more retailer has this diamond
Prices start from $3,588 SGDSave up to $656 SGD

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
$3,588 SGD