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Round|Natural|GIA

1.28ct F SI1 Round Natural Diamond

EX • F/SI1 • GIA 2567115421

Certificate GIA 2567115421

Diamond specifications and retailer prices

From €3,642 EUR
SGD 5,520 SGD
As of October 31, 2026
Save €3,302 EUR (48%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: €6,944 EUR at NZ Jewellers · As of November 2, 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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2567115421. Listed at 7 retailers as of October 31, 2026, with prices from €3,642 to €6,944, a €3,302 spread on the same certified stone. NZ Jewellers lists it at €6,944. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.28
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2567115421
Dimensions6.98 × 6.99 × 4.29 mm
L/W Ratio1.00
Culet sizeNone
Key to symbols
Feather, Crystal, Needle
Top View
6.98 mm6.99 mm1.28 ctF / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2567115421
Side View
Table 56.0%Crown 33°Girdle: MED-STKPavilion 41°Culet: NoneDepth 61.5%

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: Oct 31
Current: €6,944 EUR|Low: €3,372 EUR|High: €7,067 EUR|Avg: €4,590 EUR|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 5€3,642 EUR
Retailer 6€3,679 EUR
Retailer 2€4,052 EUR
Retailer 3€4,237 EUR
Retailer 7€4,251 EUR
Retailer 4€4,899 EUR
NZ Jewellers€6,944 EUR

43 data points across 7 retailers

7 retailers€3,642 EUR to €6,944 EUR

A
Cheapest Retailer
-
€3,642 EUR
SGD 5,520 SGD
A
Retailer 2
-
€3,679 EUR
$4,126 USD
View
Final sale: no returns
B+
Retailer 3
-
€4,052 EUR
£3,579 GBP
View
B+
Retailer 4
-
€4,237 EUR
View
Retailer 5
-
€4,251 EUR
A$7,336 AUD
View
Price last confirmed 24 days ago
B+
Retailer 6
-
€4,899 EUR
ZAR 88,772 ZAR
View
Most Expensive
B
NZ Jewellers
cfe1ff16-b810-440e-bbac-193280050860 · Nov 2
€6,944 EUR
$7,788 USD
View
6 more retailers have this diamond
Prices start from €3,642 EURSave up to €3,302 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
€3,642 EUR