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Marquise|Natural|GIA

1.21ct J SI1 Marquise Natural Diamond

GD • J/SI1 • GIA 2554338825

Certificate GIA 2554338825

Diamond specifications and retailer prices

From $3,313 SGD
As of October 31, 2026
Save $2,862 SGD (46%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $6,175 SGD at Helzberg Diamonds · As of November 3, 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 J colour (near-colourless) and SI1 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 2554338825. Listed at 14 retailers as of October 31, 2026, with prices from $3,313 to $6,175, a $2,862 spread on the same certified stone. Helzberg Diamonds lists it at $6,175. 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
J
Colour
SI1
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle43.87°
Pavilion angle39.78°
OriginNatural
Grading LabGIA
CertificateGIA 2554338825
Dimensions9.83 × 5.39 × 3.60 mm
L/W Ratio1.82
Culet sizeNone
Top View
9.83 mm5.39 mm1.21 ctJ / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2554338825
Side View
Table 59.0%Crown 43.87°Girdle: STK-VTKPavilion 39.78°Culet: NoneDepth 66.6%

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: Oct 31
Current: $6,175 SGD|Low: $3,313 SGD|High: $6,562 SGD|Avg: $4,435 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
Retailer 13
November 5, 2026
Retailer 4$3,313 SGD
Retailer 2$3,394 SGD
Retailer 9$3,564 SGD
Retailer 5$3,604 SGD
Retailer 6$3,838 SGD
Retailer 13$3,911 SGD
Retailer 11$4,195 SGD
Retailer 3$4,246 SGD
Retailer 12$4,323 SGD
Retailer 8$4,329 SGD
Retailer 7$5,478 SGD
Retailer 10$5,831 SGD
Helzberg Diamonds$6,175 SGD

40 data points across 13 retailers

14 retailers$3,313 SGD to $6,175 SGD

B+
Cheapest Retailer
-
$3,313 SGD
B+
Retailer 2
-
$3,394 SGD
View
B+
Retailer 3
-
$3,564 SGD
View
B+
Retailer 4
-
$3,604 SGD
View
B+
Retailer 5
-
$3,838 SGD
View
B
Retailer 6
-
$3,911 SGD
View
B
Retailer 7
-
$4,195 SGD
View
B
Retailer 8
-
$4,246 SGD
View
B
Retailer 9
-
$4,323 SGD
View
B
Retailer 10
-
$4,329 SGD
View
B
Retailer 11
-
$4,698 SGD
View
B
Retailer 12
-
$5,478 SGD
View
B
Retailer 13
-
$5,831 SGD
View
Most Expensive
B
Helzberg Diamonds
XZRILLKJJOOIL · Nov 3
$6,175 SGD
$4,818 USD
View
13 more retailers have this diamond
Prices start from $3,313 SGDSave up to $2,862 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 Marquise
$3,313 SGD