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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 $11,668 NZD
As of November 6, 2026
Save $9,595 NZD (45%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $21,262 NZD 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 $11,668 to $21,262, a $9,595 spread on the same certified stone. MOH London lists it at $21,262. 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: $21,262 NZD|Low: $11,455 NZD|High: $22,149 NZD|Avg: $14,689 NZD|-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$11,668 NZD
Retailer 8$12,093 NZD
Retailer 4$12,600 NZD
Retailer 5$12,647 NZD
Retailer 2$14,247 NZD
Retailer 6$14,729 NZD
Retailer 9$15,521 NZD
Retailer 3$16,646 NZD
MOH London$21,262 NZD

40 data points across 9 retailers

10 retailers$11,668 NZD to $21,262 NZD

B+
Cheapest Retailer
-
$11,668 NZD
B+
Retailer 2
-
$12,027 NZD
View
B+
Retailer 3
-
$12,093 NZD
View
B
Retailer 4
-
$12,600 NZD
View
Final sale: no returns
B
Retailer 5
-
$12,647 NZD
View
B
Retailer 6
-
$14,247 NZD
View
B
Retailer 7
-
$14,729 NZD
View
B
Retailer 8
-
$15,521 NZD
View
B
Retailer 9
-
$16,646 NZD
View
Most Expensive
B
MOH London
98A34FD36 · Nov 4
$21,262 NZD
£9,281 GBP
View
9 more retailers have this diamond
Prices start from $11,668 NZDSave up to $9,595 NZD

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
$11,668 NZD