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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 $5,224 SGD
As of October 31, 2026
Save $4,736 SGD (48%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $9,960 SGD 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 $5,224 to $9,960, a $4,736 spread on the same certified stone. NZ Jewellers lists it at $9,960. 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: $9,960 SGD|Low: $4,837 SGD|High: $10,137 SGD|Avg: $6,582 SGD|-1.7%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 3, 2026
Retailer 5$5,224 SGD
Retailer 6$5,277 SGD
Retailer 3$5,812 SGD
Retailer 2$6,083 SGD
Retailer 7$6,098 SGD
Retailer 4$7,028 SGD
NZ Jewellers$9,960 SGD

44 data points across 7 retailers

7 retailers$5,224 SGD to $9,960 SGD

A
Cheapest Retailer
-
$5,224 SGD
A
Retailer 2
-
$5,277 SGD
$4,126 USD
View
Final sale: no returns
B+
Retailer 3
-
$5,812 SGD
£3,579 GBP
View
B+
Retailer 4
-
$6,083 SGD
€4,530 EUR
View
Retailer 5
-
$6,098 SGD
A$7,336 AUD
View
Price last confirmed 24 days ago
B+
Retailer 6
-
$7,028 SGD
ZAR 88,772 ZAR
View
Most Expensive
B
NZ Jewellers
cfe1ff16-b810-440e-bbac-193280050860 · Nov 2
$9,960 SGD
$7,788 USD
View
6 more retailers have this diamond
Prices start from $5,224 SGDSave up to $4,736 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.

A
1.28ct Round
$5,224 SGD