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Marquise|Natural|GIA

1.21ct H SI1 Marquise Natural Diamond

EX • H/SI1 • GIA 1555457452

Certificate GIA 1555457452

Diamond specifications and retailer prices

From €5,374 EUR
$6,000 USD
As of November 5, 2026
1 retailer carries this diamond
Only listing: €5,374 EUR at Blue Nile
Only one retailer lists this diamond right now, and it is shown above, so there is nothing to unlock. Similar diamonds are carried by several retailers.
View at Blue Nile

About this 1.21ct natural marquise diamond

This 1.21ct natural marquise sits in the classic one-carat band, graded H 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 1555457452. Listed at a single retailer as of November 5, 2026. If it later appears at another store, Carat Hunter will surface the price comparison automatically. 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
H
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle39.68°
Pavilion angle40.01°
OriginNatural
Grading LabGIA
CertificateGIA 1555457452
Dimensions10.15 × 5.55 × 3.59 mm
L/W Ratio1.83
Girdle conditionVery Thick
Key to symbols
Cloud, Crystal, Feather, Needle, Knot, Indented Natural
Top View
10.15 mm5.55 mm1.21 ctH / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 1555457452
Side View
Table 59.0%Crown 39.68°GirdlePavilion 40.01°CuletDepth 64.6%

Caratlytics Score

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C
Average
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Price History

Last verified: Nov 5
Current: €5,374 EUR|Low: €5,016 EUR|High: €5,756 EUR|Avg: €5,559 EUR
Blue Nile
Retailer 2
Retailer 3
Retailer 4
October 1, 2026
Retailer 2€5,016 EUR
Blue Nile€5,374 EUR
Retailer 4€5,718 EUR
Retailer 3€5,756 EUR

9 data points across 4 retailers

1 retailer

C
Blue Nile
30211881 · Nov 5
€5,374 EUR
$6,000 USD
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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.

C
1.21ct Marquise
€5,374 EUR