A mineraloid is a mineral like substance that does not dumonstate crystallinity
Tektites are meteoric impact resultant glasses formed from the exposure of silicate minerals to intense heat and pressure.
Jet, obsidian, and amber are a few examples of mineraloids; mineral-like substances that do not demonstrate crystallinity.
Mineraloids are mineral like substances that don't exhibit crystallinity. Obsidian, pearl, anthracite, mercury, and jet are examples of mineraloids.
Tektites are formed by solidifying droplets of molten rock which were produced by the impact of a bolide.