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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 5241054637

Certificate GIA 5241054637

Diamond specifications and retailer prices

From $4,710 SGD
As of November 4, 2026
Save $3,729 SGD (44%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: $8,439 SGD at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 5241054637. Listed at 14 retailers as of November 4, 2026, with prices from $4,710 to $8,439, a $3,729 spread on the same certified stone. Helzberg Diamonds lists it at $8,439. 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

1.20
Carat
I
Colour
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.62°
Pavilion angle40.02°
OriginNatural
Grading LabGIA
CertificateGIA 5241054637
Dimensions10.10 × 5.46 × 3.58 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.10 mm5.46 mm1.20 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5241054637
Side View
Table 59.0%Crown 40.62°Girdle: STK-VTKPavilion 40.02°Culet: NDepth 65.6%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $8,439 SGD|Low: $4,710 SGD|High: $9,094 SGD|Avg: $6,082 SGD|-6.0%
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
November 6, 2026
Retailer 10$4,710 SGD
Retailer 12$4,784 SGD
Retailer 6$4,925 SGD
Retailer 9$5,026 SGD
Retailer 8$5,034 SGD
Retailer 4$5,143 SGD
Retailer 5$5,178 SGD
Retailer 7$5,402 SGD
Retailer 14$5,967 SGD
Retailer 3$6,011 SGD
Retailer 2$6,057 SGD
Retailer 11$7,945 SGD
Retailer 13$8,384 SGD
Helzberg Diamonds$8,439 SGD

35 data points across 14 retailers

14 retailers$4,710 SGD to $8,439 SGD

B+
Cheapest Retailer
-
$4,710 SGD
B+
Retailer 2
-
$4,784 SGD
View
B+
Retailer 3
-
$4,925 SGD
View
B+
Retailer 4
-
$5,026 SGD
View
B+
Retailer 5
-
$5,034 SGD
View
B+
Retailer 6
-
$5,143 SGD
View
B+
Retailer 7
-
$5,178 SGD
View
B
Retailer 8
-
$5,402 SGD
View
B
Retailer 9
-
$5,967 SGD
View
B
Retailer 10
-
$6,011 SGD
View
B
Retailer 11
-
$6,057 SGD
View
B
Retailer 12
-
$7,945 SGD
View
B
Retailer 13
-
$8,384 SGD
View
Most Expensive
B
Helzberg Diamonds
XZRLIKHGLKMJN · Nov 6
$8,439 SGD
$6,585 USD
View
13 more retailers have this diamond
Prices start from $4,710 SGDSave up to $3,729 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+
1.20ct Marquise
$4,710 SGD