Round|Natural|GIA

1.28ct K I1 Round Natural Diamond

EX • K/I1 • GIA 2121010513

Certificate GIA 2121010513

Diamond specifications and retailer prices

From $2,809 USD
As of November 6, 2026
Save $513 USD (15%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: $3,322 USD 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 $2,809 to $3,322, a $513 spread on the same certified stone. Yorxs lists it at $3,322. 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
Color
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: $2,809 USD|Low: $1,702 USD|High: $3,365 USD|Avg: $2,301 USD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Yorxs
November 5, 2026
Retailer 3$1,702 USD
Retailer 2$1,730 USD
Retailer 4$2,184 USD
Retailer 1$2,809 USD
Yorxs$3,322 USD

20 data points across 5 retailers

2 retailers$2,809 USD to $3,322 USD

B
Cheapest Retailer
-
$2,809 USD
Most Expensive
B
Yorxs
620946214 · Nov 5
$3,322 USD
€3,164 EUR
View
1 more retailer has this diamond
Prices start from $2,809 USDSave up to $513 USD

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
$2,809 USD