Greenstone texture pack.zip is a release file of the Minecraft resource pack Greenstone Texture pack. (Requires Optifine to fully work) v1.0 16x16, made for Minecraft 1.8.7, 1.8.4, 1.8.8, 1.8-Snapshot, 1.8.3, 1.8.6, 1.8, 1.9-Snapshot, 1.8.2, 1.8.5, 1.8.1. It was published on November 14, 2015 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the Greenstone Texture pack. (Requires Optifine to fully work) v1.0 16x16 resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.