Category talk:Crystals

Chemistry Category‑class

	This category is within the scope of WikiProject Chemistry, a collaborative effort to improve the coverage of chemistry on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.ChemistryWikipedia:WikiProject ChemistryTemplate:WikiProject ChemistryChemistry articles
Category	This category does not require a rating on Wikipedia's content assessment scale.

Physics Category‑class

	Physics portal This category is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.PhysicsWikipedia:WikiProject PhysicsTemplate:WikiProject Physicsphysics articles
Category	This category does not require a rating on Wikipedia's content assessment scale.

What is the difference between a crystal and a crystalline solid?[edit]

Category:Crystals and Category:Crystalline solids are two different categories, of which Category:Crystals is a subcategory of Category:Crystalline solids. However, the article Crystal seems to imply that a crystal and a crystalline solid is the same thing. So, why are do we have two categories? Is there any crystalline solid that is not a crystal? Unless there is a clear difference, I propose that we merge Category:Crystalline solids into this category. —Kri (talk) 12:06, 24 June 2017 (UTC)[reply]