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Marquise|Natural|GIA

1.20ct I SI1 Marquise Natural Diamond

GD • I/SI1 • GIA 5553831752

Certificate GIA 5553831752

Diamond specifications and retailer prices

From $4,400 SGD
As of November 4, 2026
Save $3,485 SGD (44%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $7,884 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 standard cut grade stated by the retailer rather than the lab and certified by GIA 5553831752. Listed at 13 retailers as of November 4, 2026, with prices from $4,400 to $7,884, a $3,485 spread on the same certified stone. Helzberg Diamonds lists it at $7,884. 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
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.81°
Pavilion angle40.44°
OriginNatural
Grading LabGIA
CertificateGIA 5553831752
Dimensions10.07 × 5.44 × 3.66 mm
L/W Ratio1.85
Culet sizeNone
Top View
10.07 mm5.44 mm1.20 ctI / SI1
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553831752
Side View
Table 60.0%Crown 42.81°Girdle: MED-VTKPavilion 40.44°Culet: NoneDepth 67.3%

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: $7,884 SGD|Low: $4,400 SGD|High: $8,464 SGD|Avg: $5,823 SGD|-6.8%
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 6, 2026
Retailer 9$4,400 SGD
Retailer 11$4,472 SGD
Retailer 7$4,507 SGD
Retailer 10$4,702 SGD
Retailer 4$4,803 SGD
Retailer 6$5,050 SGD
Retailer 8$5,554 SGD
Retailer 13$5,594 SGD
Retailer 3$5,653 SGD
Retailer 2$5,656 SGD
Retailer 12$7,422 SGD
Retailer 5$7,846 SGD
Helzberg Diamonds$7,884 SGD

32 data points across 13 retailers

13 retailers$4,400 SGD to $7,884 SGD

B+
Cheapest Retailer
-
$4,400 SGD
B+
Retailer 2
-
$4,472 SGD
View
B+
Retailer 3
-
$4,507 SGD
View
B+
Retailer 4
-
$4,702 SGD
View
B+
Retailer 5
-
$4,803 SGD
View
B
Retailer 6
-
$5,050 SGD
View
B
Retailer 7
-
$5,554 SGD
View
B
Retailer 8
-
$5,594 SGD
View
B
Retailer 9
-
$5,653 SGD
View
B
Retailer 10
-
$5,656 SGD
View
B
Retailer 11
-
$7,422 SGD
View
B
Retailer 12
-
$7,846 SGD
View
Most Expensive
B
Helzberg Diamonds
XZRLLLJOJHNLI · Nov 6
$7,884 SGD
$6,152 USD
View
12 more retailers have this diamond
Prices start from $4,400 SGDSave up to $3,485 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
$4,400 SGD