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1.21ct H SI1 Round Natural Diamond

EX • H/SI1 • GIA 6501035788

Shape and cutting style on the report: Round

Certificate GIA 6501035788

Diamond specifications and retailer prices

From $4,921 SGD
As of November 6, 2026
Save $5,833 SGD (54%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $14,823 SGD at Diamond Quarter · As of November 5, 2026
View at Diamond Quarter

About this 1.21ct natural round diamond

This 1.21ct natural round sits in the classic one-carat band, graded H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6501035788. Listed at 16 retailers as of November 5, 2026, with a 119% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.21
Carat
H
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 6501035788
Dimensions6.85 × 6.84 × 4.21 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Top View
6.85 mm6.84 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6501035788
Side View
Table 58.0%Crown 35°Girdle: MediumPavilion 41°Culet: NoneDepth 61.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: $6,021 SGD|Low: $4,301 SGD|High: $9,949 SGD|Avg: $6,432 SGD|+0.9%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 7, 2026
Retailer 5$4,960 SGD
Retailer 6$5,162 SGD
Retailer 9$5,306 SGD
Retailer 8$5,592 SGD
Retailer 1$6,021 SGD
Retailer 7$6,222 SGD
Retailer 2$6,932 SGD
Retailer 3$7,531 SGD
Retailer 4$9,804 SGD

45 data points across 9 retailers

16 retailers$4,921 SGD to $10,754 SGD

B+
Cheapest Retailer
-
$4,921 SGD
B+
Retailer 2
-
$4,960 SGD
View
B+
Retailer 3
-
$5,162 SGD
View
Final sale: no returns
B+
Retailer 4
-
$5,306 SGD
View
B+
Retailer 5
-
$5,592 SGD
View
Retailer 6
-
$5,592 SGD
View
Price last confirmed 9 days ago
B+
Retailer 7
-
$5,592 SGD
View
B+
Retailer 8
-
$6,021 SGD
View
Retailer 9
-
$6,222 SGD
View
Price last confirmed 29 days ago
B
Retailer 10
-
$6,453 SGD
View
Retailer 11
-
$6,816 SGD
View
Price last confirmed 15 days ago
B
Retailer 12
-
$6,932 SGD
View
B
Retailer 13
-
$7,531 SGD
View
B
Retailer 14
-
$9,804 SGD
View
B
Retailer 15
-
$10,754 SGD
View
Most Expensive
Diamond Quarter
1.21SI1H65885B7EN · Nov 5
$14,823 SGD
£9,107 GBP
View
Price under review
15 more retailers have this diamond
Prices start from $4,921 SGDSave up to $5,833 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.

B+
1.21ct Round
$4,921 SGD