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Marquise|Natural|GIA

1.51ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 6555830427

Certificate GIA 6555830427

Diamond specifications and retailer prices

From $11,746 SGD
As of November 4, 2026
Save $10,594 SGD (47%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: $22,340 SGD at NZ Jewellers · As of November 5, 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 H colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6555830427. Listed at 22 retailers as of November 4, 2026, with prices from $11,746 to $22,340, a $10,594 spread on the same certified stone. NZ Jewellers lists it at $22,340. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle39.8°
Pavilion angle39.44°
OriginNatural
Grading LabGIA
CertificateGIA 6555830427
Dimensions11.45 × 5.91 × 3.74 mm
L/W Ratio1.94
Culet sizeNone
Top View
11.45 mm5.91 mm1.51 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6555830427
Side View
Table 58.0%Crown 39.8°Girdle: STK-THKPavilion 39.44°Culet: NoneDepth 63.3%

Caratlytics Score

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

Price History

Last verified: Nov 4
Current: $14,340 SGD|Low: $11,746 SGD|High: $21,185 SGD|Avg: $16,148 SGD|-1.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 7, 2026
Retailer 6$11,746 SGD
Retailer 10$13,403 SGD
Retailer 1$14,340 SGD
Retailer 3$14,521 SGD
Retailer 8$14,559 SGD
Retailer 2$14,744 SGD
Retailer 11$14,950 SGD
Retailer 9$16,326 SGD
Retailer 7$16,818 SGD
Retailer 4$19,555 SGD
Retailer 5$20,877 SGD

46 data points across 11 retailers

22 retailers$11,746 SGD to $22,340 SGD

B+
Cheapest Retailer
-
$11,746 SGD
B+
Retailer 2
-
$12,435 SGD
View
B+
Retailer 3
-
$12,583 SGD
View
B
Retailer 4
-
$13,245 SGD
View
Retailer 5
-
$13,403 SGD
View
Price last confirmed 9 days ago
B
Retailer 6
-
$13,403 SGD
View
Final sale: no returns
B
Retailer 7
-
$14,340 SGD
View
B
Retailer 8
-
$14,521 SGD
View
Retailer 9
-
$14,559 SGD
View
Price last confirmed 15 days ago
B
Retailer 10
-
$14,744 SGD
View
B
Retailer 11
-
$14,950 SGD
View
B
Retailer 12
-
$15,674 SGD
View
B
Retailer 13
-
$15,674 SGD
View
B
Retailer 14
-
$15,969 SGD
View
B
Retailer 15
-
$16,199 SGD
View
B
Retailer 16
-
$16,326 SGD
View
B
Retailer 17
-
$16,754 SGD
View
B
Retailer 18
-
$16,818 SGD
View
Retailer 19
-
$17,635 SGD
View
Price last confirmed 15 days ago
B
Retailer 20
-
$19,555 SGD
View
B
Retailer 21
-
$20,877 SGD
View
Most Expensive
B
NZ Jewellers
ae7b53dc-56f9-4716-9037-2b4f7d008ff1 · Nov 5
$22,340 SGD
$17,431 USD
View
21 more retailers have this diamond
Prices start from $11,746 SGDSave up to $10,594 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
$11,746 SGD