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Marquise|Natural|GIA

1.23ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 6545405876

Certificate GIA 6545405876

Diamond specifications and retailer prices

From $8,289 SGD
As of November 6, 2026
Save $6,817 SGD (45%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $15,106 SGD at MOH London · As of November 4, 2026
View at MOH London

About this 1.23ct natural marquise diamond

This 1.23ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 6545405876. Listed at 10 retailers as of November 4, 2026, with prices from $8,289 to $15,106, a $6,817 spread on the same certified stone. MOH London lists it at $15,106. 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

1.23
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 6545405876
Dimensions11.14 × 5.62 × 3.51 mm
L/W Ratio1.98
Top View
11.14 mm5.62 mm1.23 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 6545405876
Side View
Table 59.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 62.4%

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 6
Current: $15,106 SGD|Low: $8,138 SGD|High: $15,736 SGD|Avg: $10,424 SGD|-4.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 7$8,289 SGD
Retailer 8$8,592 SGD
Retailer 4$8,952 SGD
Retailer 5$8,985 SGD
Retailer 2$10,122 SGD
Retailer 6$10,464 SGD
Retailer 9$11,027 SGD
Retailer 3$11,827 SGD
MOH London$15,106 SGD

39 data points across 9 retailers

10 retailers$8,289 SGD to $15,106 SGD

B+
Cheapest Retailer
-
$8,289 SGD
B+
Retailer 2
-
$8,544 SGD
View
B+
Retailer 3
-
$8,592 SGD
View
B
Retailer 4
-
$8,952 SGD
View
Final sale: no returns
B
Retailer 5
-
$8,985 SGD
View
B
Retailer 6
-
$10,122 SGD
View
B
Retailer 7
-
$10,464 SGD
View
B
Retailer 8
-
$11,027 SGD
View
B
Retailer 9
-
$11,827 SGD
View
Most Expensive
B
MOH London
98A34FD36 · Nov 4
$15,106 SGD
£9,281 GBP
View
9 more retailers have this diamond
Prices start from $8,289 SGDSave up to $6,817 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+
1.23ct Marquise
$8,289 SGD