Any Mirror can be enchanted by either Sun or Moon,depending upon purpose. They can be used as portals into other realms, or for divination. Also for casting spells and reflecting spells. I will not go into any spells using the mirrors, as that is not my purpose. Only to define ways that the mirror can be used, such as beauty spells, vanquishing spells, banishing spells and contacting spirits. For each of these works there's also a different magical formula. In short, I personally have found, as a Satanist, that the Spiritual Mirror is one of the most important tools that anyone practicing magic should have in their magical tool box.
Spiritual Mirror, best friend to a Satanist.
A magical item such as the "scrying mirror","black mirror", ect is used for usually divination purposes. And it is signicant to all who thinks it is, not to Satanist as a whole but maybe some Satanist. And to be quite clear NOT all Satanist even practice magick. And the whole beauty spell thing....really?
In anicent times, I have read that people charged the mirror with the moon, probably even the sun as well like you have mentioned. Over all your post is unclear.
I have found a scrying mirror very useful in my magic, it is excellent for looking inside yourself while meditating and yes you can charge it with the energies of the sun and moon, which has helped some of my spells and workings a great deal.
They are also good for reflection on your past and the choices you have made, along with past life regression. All in all I would say everyone should at least try blessing a mirror for magical use, it is one of my most used tools.
If you are using a mirror for magic it should be cleansed on a regular basis as I've found that negative vibes and energies can get trapped inside.