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Round|Natural|GIA

1.28ct I I1 Round Natural Diamond

EX • I/I1 • GIA 1159768185

Certificate GIA 1159768185

Diamond specifications and retailer prices

From €2,116 EUR
$2,364 USD
As of November 1, 2026
Save €822 EUR (28%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €4,941 EUR at NZ Jewellers · As of September 28, 2026
View at NZ Jewellers

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 I colour (near-colourless) and I1 clarity (included), with a top-tier cut grade and certified by GIA 1159768185. Listed at 10 retailers as of November 1, 2026, with a 39% 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

1.28
Carat
I
Color
I1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle34°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1159768185
Dimensions6.97 × 6.99 × 4.28 mm
L/W Ratio1.00
Star length55%
Lower girdle80%
Top View
6.97 mm6.99 mm1.28 ctI / I1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1159768185
Side View
Table 59.0%Crown 34°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 61.3%

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 1
Current: €2,938 EUR|Low: €1,817 EUR|High: €2,951 EUR|Avg: €2,387 EUR|+2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 7€1,817 EUR
Retailer 2€2,116 EUR
Retailer 4€2,174 EUR
Retailer 3€2,363 EUR
Retailer 5€2,491 EUR
Retailer 6€2,812 EUR
Retailer 1€2,938 EUR

18 data points across 7 retailers

10 retailers€2,116 EUR to €2,938 EUR

A
Cheapest Retailer
-
€2,116 EUR
$2,364 USD
A
Retailer 2
-
€2,174 EUR
$2,429 USD
View
B+
Retailer 3
-
€2,363 EUR
$2,640 USD
View
Retailer 4
-
€2,363 EUR
$2,640 USD
View
Price last confirmed 25 days ago
B+
Retailer 5
-
€2,454 EUR
$2,742 USD
View
Retailer 6
-
€2,454 EUR
$2,742 USD
View
Price last confirmed 33 days ago
B+
Retailer 7
-
€2,491 EUR
$2,783 USD
View
Retailer 8
-
€2,727 EUR
$3,047 USD
View
Price last confirmed 23 days ago
B
Retailer 9
-
€2,938 EUR
View
Most Expensive
NZ Jewellers
a599cf4d-8480-4cf6-bace-2f5c2fdad13f · Sep 28
€4,941 EUR
$5,520 USD
View
Price last confirmed 34 days ago
9 more retailers have this diamond
Prices start from €2,116 EURSave up to €822 EUR

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
1.28ct Round
€2,116 EUR