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Marquise|Natural|GIA

1.51ct I SI1 Marquise Natural Diamond

VG • I/SI1 • GIA 6555154141

Certificate GIA 6555154141

Diamond specifications and retailer prices

From $10,497 SGD
$8,208 USD
As of November 1, 2026
Save $8,191 SGD (44%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $18,689 SGD at NZ Jewellers · As of October 30, 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 SI1 clarity (slightly-included), with a very-good cut grade stated by the retailer rather than the lab and certified by GIA 6555154141. Listed at 16 retailers as of October 30, 2026, with prices from $10,497 to $18,689, a $8,191 spread on the same certified stone. NZ Jewellers lists it at $18,689. 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
SI1
Clarity
Very Good
Cut (retailer stated)

Specifications

Cut (retailer stated)Very Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.42°
Pavilion angle37.74°
OriginNatural
Grading LabGIA
CertificateGIA 6555154141
Dimensions12.68 × 5.80 × 3.40 mm
L/W Ratio2.19
Top View
12.68 mm5.80 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6555154141
Side View
Table 60.0%Crown 39.42°Girdle: MED-VTKPavilion 37.74°Culet: NoneDepth 58.6%

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 1
Current: $12,722 SGD|Low: $12,159 SGD|High: $17,723 SGD|Avg: $14,002 SGD|-1.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 2, 2026
Retailer 3$12,159 SGD
Retailer 6$12,309 SGD
Retailer 7$12,334 SGD
Retailer 1$12,722 SGD
Retailer 2$14,123 SGD
Retailer 5$16,473 SGD
Retailer 4$17,512 SGD

38 data points across 7 retailers

16 retailers$10,497 SGD to $18,689 SGD

B+
Cheapest Retailer
-
$10,497 SGD
$8,208 USD
B+
Retailer 2
-
$11,133 SGD
$8,705 USD
View
B+
Retailer 3
-
$11,213 SGD
$8,768 USD
View
B+
Retailer 4
-
$11,307 SGD
$8,841 USD
View
B
Retailer 5
-
$11,954 SGD
$9,347 USD
View
B
Retailer 6
-
$12,147 SGD
$9,498 USD
View
B+
Retailer 7
-
$12,159 SGD
£7,486 GBP
View
Retailer 8
-
$12,309 SGD
A$14,807 AUD
View
Price last confirmed 11 days ago
B
Retailer 9
-
$12,334 SGD
$9,644 USD
View
B
Retailer 10
-
$12,722 SGD
£7,833 GBP
View
B
Retailer 11
-
$14,015 SGD
$10,959 USD
View
B
Retailer 12
-
$14,123 SGD
€10,517 EUR
View
Retailer 13
-
$14,759 SGD
$11,540 USD
View
Price last confirmed 10 days ago
B
Retailer 14
-
$16,473 SGD
ZAR 208,082 ZAR
View
B
Retailer 15
-
$17,512 SGD
£10,782 GBP
View
Most Expensive
B
NZ Jewellers
10678399-9b5e-4a92-b356-16fd98a4ee16 · Oct 30
$18,689 SGD
$14,613 USD
View
15 more retailers have this diamond
Prices start from $10,497 SGDSave up to $8,191 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
$10,497 SGD