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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

EX • I/SI2 • GIA 6555960270

Certificate GIA 6555960270

Diamond specifications and retailer prices

From $3,818 SGD
As of November 4, 2026
Save $3,442 SGD (47%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $7,260 SGD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555960270. Listed at 12 retailers as of November 4, 2026, with prices from $3,818 to $7,260, a $3,442 spread on the same certified stone. Helzberg Diamonds lists it at $7,260. 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
I
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.95°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6555960270
Dimensions11.13 × 5.44 × 3.28 mm
L/W Ratio2.05
Culet sizeNone
Top View
11.13 mm5.44 mm1.21 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555960270
Side View
Table 58.0%Crown 36.95°Girdle: ThickPavilion 37.98°Culet: NDepth 60.2%

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 4
Current: $7,260 SGD|Low: $3,818 SGD|High: $7,715 SGD|Avg: $5,049 SGD|-5.9%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 8$3,818 SGD
Retailer 5$3,905 SGD
Retailer 7$3,910 SGD
Retailer 9$4,115 SGD
Retailer 2$4,455 SGD
Retailer 3$4,600 SGD
Retailer 10$4,844 SGD
Retailer 11$4,889 SGD
Retailer 12$4,982 SGD
Retailer 6$5,075 SGD
Retailer 4$6,813 SGD
Helzberg Diamonds$7,260 SGD

38 data points across 12 retailers

12 retailers$3,818 SGD to $7,260 SGD

A
Cheapest Retailer
-
$3,818 SGD
A
Retailer 2
-
$3,905 SGD
View
A
Retailer 3
-
$3,910 SGD
View
A
Retailer 4
-
$4,115 SGD
View
B+
Retailer 5
-
$4,455 SGD
View
B+
Retailer 6
-
$4,600 SGD
View
B+
Retailer 7
-
$4,844 SGD
View
B+
Retailer 8
-
$4,889 SGD
View
B+
Retailer 9
-
$4,982 SGD
View
B+
Retailer 10
-
$5,075 SGD
View
B
Retailer 11
-
$6,813 SGD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLLPMGING · Nov 6
$7,260 SGD
$5,665 USD
View
11 more retailers have this diamond
Prices start from $3,818 SGDSave up to $3,442 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
1.21ct Marquise
$3,818 SGD