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Marquise|Natural|GIA

1.21ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 6551273825

Certificate GIA 6551273825

Diamond specifications and retailer prices

From $3,339 SGD
As of November 5, 2026
Save $2,737 SGD (45%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $6,076 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 6551273825. Listed at 12 retailers as of November 5, 2026, with prices from $3,339 to $6,076, a $2,737 spread on the same certified stone. Helzberg Diamonds lists it at $6,076. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.21
Carat
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.52°
Pavilion angle37.98°
OriginNatural
Grading LabGIA
CertificateGIA 6551273825
Dimensions9.85 × 5.41 × 3.52 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.85 mm5.41 mm1.21 ctI / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6551273825
Side View
Table 60.0%Crown 43.52°Girdle: MED-VTKPavilion 37.98°Culet: NoneDepth 65.1%

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 5
Current: $6,076 SGD|Low: $3,259 SGD|High: $6,586 SGD|Avg: $4,476 SGD|-7.7%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 7$3,339 SGD
Retailer 4$3,474 SGD
Retailer 8$3,533 SGD
Retailer 2$3,765 SGD
Retailer 3$3,847 SGD
Retailer 5$3,894 SGD
Retailer 10$4,131 SGD
Retailer 6$4,247 SGD
Retailer 11$4,261 SGD
Retailer 9$5,731 SGD
Helzberg Diamonds$6,076 SGD

44 data points across 11 retailers

12 retailers$3,339 SGD to $6,076 SGD

A
Cheapest Retailer
-
$3,339 SGD
A
Retailer 2
-
$3,474 SGD
View
B+
Retailer 3
-
$3,533 SGD
View
B+
Retailer 4
-
$3,765 SGD
View
B+
Retailer 5
-
$3,847 SGD
View
B+
Retailer 6
-
$3,894 SGD
View
B+
Retailer 7
-
$4,131 SGD
View
B+
Retailer 8
-
$4,247 SGD
View
B+
Retailer 9
-
$4,261 SGD
View
B
Retailer 10
-
$4,623 SGD
View
B
Retailer 11
-
$5,731 SGD
View
Most Expensive
B
Helzberg Diamonds
XZRMLLHINJOIL · Nov 6
$6,076 SGD
$4,741 USD
View
11 more retailers have this diamond
Prices start from $3,339 SGDSave up to $2,737 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
$3,339 SGD