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Marquise|Natural|GIA

1.51ct I SI2 Marquise Natural Diamond

GD • I/SI2 • GIA 5553335027

Certificate GIA 5553335027

Diamond specifications and retailer prices

From $12,948 SGD
£7,972 GBP
As of October 27, 2026
Save $1,982 SGD (13%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: $19,840 SGD at NZ Jewellers · As of October 24, 2026
View at NZ Jewellers

About this 1.51ct natural marquise diamond

This 1.51ct natural marquise sits in the one-and-a-half to two 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 5553335027. Listed at 12 retailers as of October 27, 2026, with a relatively tight 15% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
I
Colour
SI2
Clarity
Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Good
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 5553335027
Dimensions11.41 × 5.95 × 3.78 mm
L/W Ratio1.92
Culet sizeNone
Key to symbols
Twinning Wisp
Top View
11.41 mm5.95 mm1.51 ctI / SI2
OriginNatural
CutGood
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 5553335027
Side View
Table 63.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 63.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Oct 27
Current: $12,948 SGD|Low: $9,521 SGD|High: $18,815 SGD|Avg: $13,982 SGD|-0.6%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 27, 2026
Retailer 9$9,521 SGD
Retailer 4$11,146 SGD
Retailer 6$12,002 SGD
Retailer 1$12,948 SGD
Retailer 2$13,945 SGD
Retailer 8$14,930 SGD
Retailer 5$15,667 SGD
Retailer 7$16,969 SGD
Retailer 3$18,615 SGD

37 data points across 9 retailers

12 retailers$12,948 SGD to $14,930 SGD

Retailer 1
-
$11,146 SGD
$8,715 USD
Price last confirmed 7 days ago
Retailer 2
-
$11,904 SGD
$9,308 USD
View
Price last confirmed 8 days ago
Retailer 3
-
$12,002 SGD
$9,385 USD
View
Price last confirmed 7 days ago
Retailer 4
-
$12,895 SGD
$10,083 USD
View
Price last confirmed 7 days ago
B
Retailer 5
-
$12,948 SGD
£7,972 GBP
View
Retailer 6
-
$13,093 SGD
$10,238 USD
View
Price last confirmed 8 days ago
B
Retailer 7
-
$13,945 SGD
€10,385 EUR
View
Retailer 8
-
$14,880 SGD
$11,635 USD
View
Price last confirmed 10 days ago
B
Retailer 9
-
$14,930 SGD
$11,674 USD
View
Retailer 10
-
$15,667 SGD
$12,250 USD
View
Price last confirmed 10 days ago
Retailer 11
-
$18,615 SGD
£11,461 GBP
View
Price last confirmed 7 days ago
Most Expensive
NZ Jewellers
a6473564-b211-4a65-9415-113b15da3cd8 · Oct 24
$19,840 SGD
$15,513 USD
View
Price last confirmed 9 days ago
11 more retailers have this diamond
Prices start from $12,948 SGDSave up to $1,982 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
1.51ct Marquise
$12,948 SGD