Most 'types' of gemstones are really just different colours of the same materials. For instance, Emerald is just a colour of beryl. Ruby is a colour of corundum (red, with all OTHER colours being called sapphire -- even some red ones). Citrine is a colour range of quartz. Some colours are worth more
ok i have another quote tweet prompt. what's something, big or small, related to your job or hobby, that most people don't know that you would like to have them know? it can be a concept, a piece of history, some vocabulary, or something else.
