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Marquise|Natural|GIA

1.51ct F SI2 Marquise Natural Diamond

GD • F/SI2 • GIA 1558632218

Certificate GIA 1558632218

Diamond specifications and retailer prices

From $7,781 SGD
As of November 1, 2026
Save $2,298 SGD (23%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $12,774 SGD at Helzberg Diamonds · As of October 21, 2026
View at Helzberg Diamonds

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a standard cut grade stated by the retailer rather than the lab and certified by GIA 1558632218. Listed at 11 retailers as of November 1, 2026, with a 30% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.51
Carat
F
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.67°
Pavilion angle39.9°
OriginNatural
Grading LabGIA
CertificateGIA 1558632218
Dimensions10.67 × 5.86 × 3.91 mm
L/W Ratio1.82
Culet sizeNone
Top View
10.67 mm5.86 mm1.51 ctF / SI2
OriginNatural
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1558632218
Side View
Table 60.0%Crown 42.67°Girdle: STK-VTKPavilion 39.9°Culet: NoneDepth 66.7%

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 1
Current: $12,774 SGD|Low: $7,781 SGD|High: $13,341 SGD|Avg: $9,506 SGD|-4.3%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 4$7,781 SGD
Retailer 6$8,100 SGD
Retailer 9$8,234 SGD
Retailer 11$8,423 SGD
Retailer 2$8,588 SGD
Retailer 5$8,913 SGD
Retailer 3$9,749 SGD
Retailer 10$9,813 SGD
Retailer 8$9,859 SGD
Retailer 7$9,937 SGD
Helzberg Diamonds$12,774 SGD

40 data points across 11 retailers

11 retailers$7,781 SGD to $10,079 SGD

A
Cheapest Retailer
-
$7,781 SGD
A
Retailer 2
-
$8,100 SGD
View
A
Retailer 3
-
$8,234 SGD
$6,438 USD
View
A
Retailer 4
-
$8,423 SGD
$6,586 USD
View
A
Retailer 5
-
$8,588 SGD
£5,287 GBP
View
A
Retailer 6
-
$8,913 SGD
$6,969 USD
View
B+
Retailer 7
-
$9,749 SGD
$7,623 USD
View
Retailer 8
-
$9,813 SGD
$7,673 USD
View
Price last confirmed 11 days ago
B+
Retailer 9
-
$9,937 SGD
$7,770 USD
View
B+
Retailer 10
-
$10,079 SGD
$7,881 USD
View
Most Expensive
Helzberg Diamonds
XZRHLLOMJIIHO · Oct 21
$12,774 SGD
$9,988 USD
View
Price last confirmed 13 days ago
10 more retailers have this diamond
Prices start from $7,781 SGDSave up to $2,298 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
1.51ct Marquise
$7,781 SGD