Imagery:
Very well done. The way you described her touching all the details meant not only could I see, but also feel the the textures and contours of her frail form.

New vocabulary:
I didn't know what a clavicle was. It sounds much cooler than boring old "collarbone"!

Alternate interpretations:
From the description, I concluded that the poem depicted an anorexic woman feeling her prominent bones and being satisfied. Without the guiding description, it could be seen as a psychopathic serial killer who kills her victims by starvation and is examining her latest corpse... Wrong? Sorry.

More on the description:
By starting out by saying the poems was about bones, not a disorder, I got a "denial" feeling that matched the topic. I'm possibly reading too much into that, but whatever.

Symbolism:
You describe her caresses as owner would a long journey over a mountainous landscape. Is that some sort of metaphor? Like, overcoming the obstacles associated with eating disorders?

Format:
There's not much in the was of fancy formatting in this poem. In a way that's a good thing, it lets the words speak for themselves.

Sound:
I don't read very much poetry, and I often struggle to say it the way you're meant to. Free verse poetry ought to be the hardest to write so that a non-poet like myself can appreciate it, and yet your choice if words made it easy. It sounded like poetry on my first try.

Minor criticism:
A really, really little thing, I promise. "And she smiles a secret smile" is a phrase I've heard before. It doesn't have the same sense of originality as the rest of the poem.

Emotions:
There is conflict ion in this piece. The woman is happy, and yet we feel sad for her. The poem sounds cool, and yet it seems wrong to enjoy a description of a serious illness. I like that it is not straight forward, happy or sad. I think it us the complexity of such an odd mix of emotions that gives the poem it's depth.

Thank you for sharing this exceptional poem,
—Taliah