Tanzanite, ruby in zoisite, with ruby zoisite and kyanite center piece handmade

Handmade necklace of tanzanite and ruby in zoisite with a ruby zoisite and kyanite center piece, toggle is a twister 22 inches long

Tanzanite is a variety of zoisite and a member of the epidote group, crystallizing in masses, grains, and striated prismatic crystals. Color ranges from colorless, pale yellow, brown, greyish brown, brownish blue, and blue or purple-blue. Originates in Tanzania Africa.
Calcium aluminum hydroxy silicate

zoisite is a member of the epidote group, and crystallizes in the form of masses and straited prismatic crystals. the color range includes colorless, white, pink, brown-tan, blue, purple, yellow, yellow-brown, green, and red. located in Tanzania Africa
calcium aluminum silicate hydroxide