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Marquise|Natural|GIA

1.21ct J SI1 Marquise Natural Diamond

EX • J/SI1 • GIA 5241045555

Certificate GIA 5241045555

Diamond specifications and retailer prices

From €2,533 EUR
$2,841 USD
As of October 31, 2026
Save €2,285 EUR (47%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €4,818 EUR at Helzberg Diamonds · As of November 2, 2026
View at Helzberg Diamonds

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 5241045555. Listed at 14 retailers as of October 31, 2026, with prices from €2,533 to €4,818, a €2,285 spread on the same certified stone. Helzberg Diamonds lists it at €4,818. 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

1.21
Carat
J
Color
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle39.63°
Pavilion angle40.08°
OriginNatural
Grading LabGIA
CertificateGIA 5241045555
Dimensions11.24 × 5.28 × 3.40 mm
L/W Ratio2.13
Culet sizeNone
Top View
11.24 mm5.28 mm1.21 ctJ / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5241045555
Side View
Table 59.0%Crown 39.63°Girdle: STK-THKPavilion 40.08°Culet: NDepth 64.3%

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: Oct 31
Current: €4,818 EUR|Low: €2,533 EUR|High: €5,197 EUR|Avg: €3,393 EUR|-7.3%
Helzberg Diamonds
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 2, 2026
Retailer 12€2,533 EUR
Retailer 11€2,580 EUR
Retailer 8€2,672 EUR
Retailer 9€2,731 EUR
Retailer 10€2,737 EUR
Retailer 7€2,961 EUR
Retailer 5€3,052 EUR
Retailer 3€3,236 EUR
Retailer 13€3,252 EUR
Retailer 4€3,324 EUR
Retailer 2€3,384 EUR
Retailer 6€4,272 EUR
Retailer 14€4,531 EUR
Helzberg Diamonds€4,818 EUR

34 data points across 14 retailers

14 retailers€2,533 EUR to €4,818 EUR

B+
Cheapest Retailer
-
€2,533 EUR
$2,841 USD
B+
Retailer 2
-
€2,580 EUR
SGD 3,911 SGD
View
B+
Retailer 3
-
€2,672 EUR
$2,997 USD
View
B+
Retailer 4
-
€2,731 EUR
$3,063 USD
View
B+
Retailer 5
-
€2,737 EUR
$3,070 USD
View
B
Retailer 6
-
€2,961 EUR
£2,615 GBP
View
B+
Retailer 7
-
€3,052 EUR
SGD 4,626 SGD
View
B
Retailer 8
-
€3,236 EUR
$3,630 USD
View
B
Retailer 9
-
€3,252 EUR
$3,648 USD
View
B
Retailer 10
-
€3,324 EUR
$3,728 USD
View
B
Retailer 11
-
€3,384 EUR
View
B
Retailer 12
-
€4,272 EUR
$4,792 USD
View
B
Retailer 13
-
€4,531 EUR
$5,082 USD
View
Most Expensive
B
Helzberg Diamonds
XZRLIKHGKLLLL · Nov 2
€4,818 EUR
$5,404 USD
View
13 more retailers have this diamond
Prices start from €2,533 EURSave up to €2,285 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+
1.21ct Marquise
€2,533 EUR