Refined Amethyst

When you look at a crystal, you can partially see through it. However, in Minecraft an amethyst block does not carry this feature. So, in spite of this, there could still be a translucent amethyst block. If you smelt an amethyst block, you could get a refined amethyst block. It would purple on the edges, and a clear-ish pink in the middle. you can't see through this block, but light can pass through it. If you use this and iron in a crafting grid, you could get angled refined amethyst, which you could walk up like stairs, and would angle light.