Iconic logo for Jewelry and Objets d'Art brand

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This customer received 32 graphic designs from 11 designers. They chose this graphic design from Grace A as the winning design.
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A logo that is simple and striking, serious and classic with an undertone of playfulness. It should be able to be used in a tiny size, stamped / laser inscribed into the products themselves, as well as larger (web, print, etc).
The name Castoro means beaver; I have some sketches of a mix of the initial A and a beaver; see attached files. I'd like to see a properly rendered and polished version of this but also open to new directions.
Updates
Project Deadline Extended
Reason: There have been some great submissions, but to give some other designers a chance and the existing ones some time to make changes and alterations to their designs, the deadline has been slightly extended.... Thanks to all of you and Good Luck !
Added Thursday, April 2, 2015
Target Market(s)
Middle to high end, individuals who seek and recognize unusual and unique designs, who value art and consider themselves creative and intelligent
Industry/Entity Type
Jewelry
Font styles to use
Other font styles liked:
- DIDOT styles
Colors
Colors selected by the customer to be used in the logo design:
Look and feel
Each slider illustrates characteristics of the customer's brand and the style your logo design should communicate.
Elegant
Bold
Playful
Serious
Traditional
Modern
Personable
Professional
Feminine
Masculine
Colorful
Conservative
Economical
Upmarket
Requirements
Must have
- The logo should work as a tiny piece - for example it will be lasered into the inside of a ring, and will measure 1x1.5mm ...
Nice to have
- I would like to see a completed version of my sketch idea. (See attached images)
Should not have
- It should not be a long, lengthy logo, for example using the name "Adriano Castoro".
- Bear in mind it will also be used as a small stamp.