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Round|Natural|GIA

1.20ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1563043428

Certificate GIA 1563043428

Diamond specifications and retailer prices

From $2,769 SGD
$2,166 USD
As of October 25, 2026
Save $2,333 SGD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $5,102 SGD at Helzberg Diamonds · As of October 25, 2026
View at Helzberg Diamonds

About this 1.2ct natural round diamond

This 1.2ct natural round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1563043428. Listed at 14 retailers as of October 25, 2026, with prices from $2,769 to $5,102, a $2,333 spread on the same certified stone. Helzberg Diamonds lists it at $5,102. 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

1.20
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle36.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1563043428
Dimensions6.77 × 6.79 × 4.23 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.77 mm6.79 mm1.20 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1563043428
Side View
Table 57.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 25
Current: $5,102 SGD|Low: $2,620 SGD|High: $5,364 SGD|Avg: $3,566 SGD|-3.8%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 26, 2026
Retailer 13$2,620 SGD
Retailer 11$2,769 SGD
Retailer 9$2,821 SGD
Retailer 12$2,846 SGD
Retailer 8$2,851 SGD
Retailer 7$2,990 SGD
Retailer 5$3,097 SGD
Retailer 14$3,363 SGD
Retailer 4$3,543 SGD
Retailer 10$3,564 SGD
Retailer 2$3,655 SGD
Retailer 6$4,338 SGD
Retailer 3$4,671 SGD
Helzberg Diamonds$5,102 SGD

28 data points across 14 retailers

14 retailers$2,769 SGD to $5,102 SGD

Retailer 1
-
$2,620 SGD
Price last confirmed 7 days ago
A
Retailer 2
-
$2,769 SGD
$2,166 USD
View
Retailer 3
-
$2,821 SGD
$2,207 USD
View
Price last confirmed 7 days ago
Retailer 4
-
$2,846 SGD
$2,226 USD
View
Price last confirmed 7 days ago
A
Retailer 5
-
$2,851 SGD
$2,230 USD
View
A
Retailer 6
-
$2,990 SGD
£1,841 GBP
View
A
Retailer 7
-
$3,097 SGD
View
Retailer 8
-
$3,363 SGD
$2,631 USD
View
Price last confirmed 7 days ago
Retailer 9
-
$3,543 SGD
$2,771 USD
View
Price last confirmed 7 days ago
A
Retailer 10
-
$3,564 SGD
£2,195 GBP
View
A
Retailer 11
-
$3,655 SGD
€2,723 EUR
View
Retailer 12
-
$4,338 SGD
$3,393 USD
View
Price last confirmed 7 days ago
Retailer 13
-
$4,671 SGD
$3,654 USD
View
Price last confirmed 8 days ago
Most Expensive
B+
Helzberg Diamonds
XZRHLMJGKJKIO · Oct 25
$5,102 SGD
$3,991 USD
View
13 more retailers have this diamond
Prices start from $2,769 SGDSave up to $2,333 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
1.20ct Round
$2,769 SGD