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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 €5,793 EUR
As of November 6, 2026
Save €4,764 EUR (45%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €10,557 EUR 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 €5,793 to €10,557, a €4,764 spread on the same certified stone. MOH London lists it at €10,557. 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
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €10,557 EUR|Low: €5,687 EUR|High: €10,997 EUR|Avg: €7,293 EUR|-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€5,793 EUR
Retailer 8€6,005 EUR
Retailer 4€6,256 EUR
Retailer 5€6,279 EUR
Retailer 2€7,074 EUR
Retailer 6€7,313 EUR
Retailer 9€7,706 EUR
Retailer 3€8,265 EUR
MOH London€10,557 EUR

40 data points across 9 retailers

10 retailers€5,793 EUR to €10,557 EUR

B+
Cheapest Retailer
-
€5,793 EUR
B+
Retailer 2
-
€5,971 EUR
View
B+
Retailer 3
-
€6,005 EUR
View
B
Retailer 4
-
€6,256 EUR
View
Final sale: no returns
B
Retailer 5
-
€6,279 EUR
View
B
Retailer 6
-
€7,074 EUR
View
B
Retailer 7
-
€7,313 EUR
View
B
Retailer 8
-
€7,706 EUR
View
B
Retailer 9
-
€8,265 EUR
View
Most Expensive
B
MOH London
98A34FD36 · Nov 4
€10,557 EUR
£9,281 GBP
View
9 more retailers have this diamond
Prices start from €5,793 EURSave up to €4,764 EUR

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
€5,793 EUR