The internal structure of precious opal makes it diffract light; depending on the conditions in which it formed, it can take on many colors. Description from blog.aviantijewelry.com. I searched for this on bing.com/images
MONKSHOOD - EISENHUT - ACÓNITO (Aconitum) also known as "the queen of poisons", aconite, monkshood, wolf's bane, leopard's bane, women's bane, devil's helmet or blue rocket. The name comes from the Greek ἀκόνιτον meaning 'without struggle'. Toxins extracted from the plant were used to kill wolves in older times, hence the name wolf's bane.