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Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

EX • D/SI1 • GIA 2566258812

Certificate GIA 2566258812

Diamond specifications and retailer prices

From €4,092 EUR
As of November 6, 2026
Save €3,932 EUR (49%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: €9,256 EUR at NZ Jewellers · As of October 17, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct 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 2566258812. Listed at 19 retailers as of November 4, 2026, with a 96% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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

1.20
Carat
D
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
OriginNatural
Grading LabGIA
CertificateGIA 2566258812
Dimensions10.66 × 5.52 × 3.50 mm
L/W Ratio1.93
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Indented Natural
Top View
10.66 mm5.52 mm1.20 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceFaint
CertificateGIA 2566258812
Side View
Table 59.0%CrownGirdle: THN-THKPavilionCulet: 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: €5,298 EUR|Low: €4,058 EUR|High: €8,251 EUR|Avg: €5,804 EUR|-3.0%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 6, 2026
Retailer 12€4,092 EUR
Retailer 13€4,511 EUR
Retailer 3€4,670 EUR
Retailer 9€4,884 EUR
Retailer 4€5,041 EUR
Retailer 6€5,052 EUR
Retailer 7€5,189 EUR
Retailer 1€5,298 EUR
Retailer 5€5,499 EUR
Retailer 2€5,601 EUR
Retailer 11€5,942 EUR
Retailer 8€6,664 EUR
Retailer 14€7,586 EUR
Retailer 10€8,024 EUR

38 data points across 14 retailers

19 retailers€4,092 EUR to €8,024 EUR

B+
Cheapest Retailer
-
€4,092 EUR
B+
Retailer 2
-
€4,511 EUR
View
Retailer 3
-
€4,670 EUR
View
Price last confirmed 10 days ago
B+
Retailer 4
-
€4,884 EUR
View
B+
Retailer 5
-
€5,041 EUR
View
Final sale: no returns
B+
Retailer 6
-
€5,052 EUR
View
B+
Retailer 7
-
€5,189 EUR
View
B+
Retailer 8
-
€5,298 EUR
View
Retailer 9
-
€5,499 EUR
View
Price last confirmed 33 days ago
Retailer 10
-
€5,534 EUR
View
Price last confirmed 20 days ago
Retailer 11
-
€5,534 EUR
View
Price last confirmed 21 days ago
Retailer 12
-
€5,534 EUR
View
Price last confirmed 19 days ago
B
Retailer 13
-
€5,601 EUR
View
B
Retailer 14
-
€5,942 EUR
View
Retailer 15
-
€6,385 EUR
View
Price last confirmed 18 days ago
B
Retailer 16
-
€6,664 EUR
View
Retailer 17
-
€7,586 EUR
View
Price last confirmed 9 days ago
B
Retailer 18
-
€8,024 EUR
View
Most Expensive
NZ Jewellers
fd206e61-88f7-4d07-bbc1-3efa3b71bb88 · Oct 17
€9,256 EUR
$10,334 USD
View
Price last confirmed 19 days ago
18 more retailers have this diamond
Prices start from €4,092 EURSave up to €3,932 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+
1.20ct Marquise
€4,092 EUR