Marquise|Natural|GIA

1.23ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 1549965780

Certificate GIA 1549965780

Diamond specifications and retailer prices

From €5,148 EUR
As of November 6, 2026
Save €3,555 EUR (41%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: €8,703 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 1549965780. Listed at 9 retailers as of November 4, 2026, with prices from €5,148 to €8,703, a €3,555 spread on the same certified stone. MOH London lists it at €8,703. 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
PolishVery Good
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1549965780
Dimensions12.23 × 5.23 × 3.32 mm
L/W Ratio2.34
Key to symbols
Twinning Wisp, Feather, Crystal, Needle, Indented Natural
Top View
12.23 mm5.23 mm1.23 ctD / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceNone
CertificateGIA 1549965780
Side View
Table 57.0%CrownGirdle: MED-VTKPavilionCulet: NoneDepth 63.5%

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: €8,703 EUR|Low: €4,442 EUR|High: €8,831 EUR|Avg: €5,907 EUR|-1.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 5, 2026
Retailer 4€4,457 EUR
Retailer 6€4,722 EUR
Retailer 5€5,148 EUR
Retailer 2€5,625 EUR
Retailer 7€5,808 EUR
Retailer 3€6,444 EUR
MOH London€8,703 EUR

41 data points across 7 retailers

9 retailers€5,148 EUR to €8,703 EUR

Retailer 1
-
€4,457 EUR
Price last confirmed 15 days ago
Retailer 2
-
€4,683 EUR
View
Price last confirmed 15 days ago
Retailer 3
-
€4,867 EUR
View
Price last confirmed 30 days ago
B+
Retailer 4
-
€5,148 EUR
View
B+
Retailer 5
-
€5,625 EUR
View
Retailer 6
-
€5,808 EUR
View
Price last confirmed 34 days ago
B
Retailer 7
-
€6,065 EUR
View
B
Retailer 8
-
€6,444 EUR
View
Most Expensive
B
MOH London
83C545528 · Nov 4
€8,703 EUR
£7,651 GBP
View
8 more retailers have this diamond
Prices start from €5,148 EURSave up to €3,555 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
€5,148 EUR