In bulk, they look a lot like liquid soap; many liquid crystals are made of materials that chemically are a lot like soap.
It's not that only alum makes big crystals.. There are so many compounds that can make big crystals. Even Sodium Hydroxide makes very good and big crystals. For crystals you need a uniform arrangement of atoms in space. For big crystals all you need is patience. The slower is the crystallization process the bigger crystals are formed. What industries do is called seeding. They make a good concentrated solution of the compound whose crystals are needed and then they put a crystal of the same compound in the solution. The new crystals form and attach to the crystal making quick and big crystals.
There are different minerals in different crystals which make them different colors. And "imperities"
The materials made to make clothing varry. Materials such as wool and cotton are often used to make many different types of clothing.
baking soda is powder. so it dissolves faster. sugar has small crystals so it takes sometimes.
salt
The materials that make up noctilucent clouds are tiny water Ice crystals and dust particles.
Crystals
Swarovski crystals are made of 32% lead. Chemical coatings are used to make the different colors of the crystals. Authentic Swarovski crystals are only made in Austria.
TNT and ender crystals
Crystals.
All salts make crystals.
There are many ways to make crystals from scratch.
glass and liquid crystals that react to pressure
crystals
what do you need to make a borax crystals
Piezo electricity. When crystals are impacted electrons are forced to impart energy and make other electrons do work.