2, daily can be respected at home. When you have time, you can look at some Buddhist scriptures and worship them respectfully, which is the same as the merit of worshipping Buddha statues in temples. However, it is better to have a good incense to offer, and at the same time, it is better to point a incense for praying without phase in the copper furnace for sincere offering.
3. Obsidian is all-encompassing and can be worn with people, jewelry, jade and other accessories, but be careful not to touch it as much as possible, especially the obsidian made of jade, which is easy to be damaged.
Amitabha!