Start with where an object will live and how it will be handled. A pendant needs a comfortable weight and a surface that tolerates contact; a shelf object needs stable proportions and enough visual presence for its setting.
Next, look at the material in ordinary light. Inclusions, clouding and color shifts are evidence of natural variation, not a score of quality by themselves. Ask for dimensions and representative photography when scale matters.
Words such as “calm,” “focus,” or “connection” can be useful editorial themes, but they are not medical, financial or personal-outcome claims. Choose the object for its material, craft, meaning to you and suitability for the intended context.