Gifting and creating orgonite with astrology

I asked the chatroom last sunday how they felt about pouring and gifting during astrologically significant moments, times when the odor is likely to be holding rituals. Regrettably it was off topic but Carol said that it was a valid concept but to be sure to put pleanty of black stones in to absorb the black magick. As it was not the appropriate time to continue the discussion I did not pursue it further and black tourmoline (sp?) came to mind immediately but I am wondering now what else might be used, and if obsidian seems reasonable to anyone