Crystals tilesets created as drop-in replacements for Stendhal. These tilesets are based on the following CC0-licensed vector images:

• Minerals by Chris Fiedler (Chrisdesign) & Iwan Gabovitch (qubodup).
• Purple Amethyst by MrSmiles.

Tileset details:

• Designed for use with 32x32 tiled maps.
• Orientation: orthogonal
• Dimensions: 32x32, 64x96, & 160x128
• PNG images use indexed color (smaller files).
• Images with more than 256 colors use RGB color.
• GIMP sources (.xcf) use RGB color.

Licensing:

• Creative Commons Zero (CC0)

TODO:

• Mirror tiles.
• Create re-colors of alternate small crystal.
• Merge alternate small crystal with other tilesets.

Notes:

• The Purple Amethyst is so heavily edited that I no longer consider my work a "derivative". For that reason alone I have not included MrSmiles in the attribution section.
• IMPORTANT:
• I have re-released these under CC0. They were previously under OGA BY 3.0 / CC BY 3.0.
• It is not required to attribute the authors, but their names are listed in the Copyright/Attribution Notice section for reference for anyone that would like to credit them.

Some other interesting crystals & gems submissions:

• Animated Spinning Gems by codeinfernogames (CC BY)
• Basic Gems Icon Set by yinakoSGA (CC BY)
• Crystals by Ignas Dauksa (CC0)
• Crystals and Stone set by phobi (CC0)
• diamond by soundemperor (CC BY)
• Gem Icons by Clint Bellanger (CC BY-SA)
• Gem Match 3 Set by Andrew Tidey (CC0)
• Green cristal by yolkati (CC BY-SA / GPL)
• Hand-Drawn Crystal Sprites by Diane Mueller (CC0)
• Magical Gems by Evilence (CC0)
• Red Crystal Cluster by FunwithPixels (CC BY)
• Rotating Crystal Animation by Iwan Gabovitch (CC BY / GPL)
• Six grades of gems by Hansjörg Malthaner (OGA BY / CC BY / CC BY-SA / GPL)
• Spike Aqua Crystal w/ Rock Base by FunwithPixels (CC BY / CC BY-SA)
• Whispers of Avalon: crystal save point by Leonard Pabin (CC BY / GPL)

Original link: https://opengameart.org/node/79572