Emerald is a gemstone, a mineral variety of beryl with colouring ranging from green to blue-green and is composed largely of silicon, vanadium, aluminium and oxygen. It has an octahedral conformation and the cell edge, on the a-axis, is elongated. It formed over time by epitaxial nucleation on shales with aluminium, beryl and alkali.

Safety
Aluminium can interfere with different biological processes (cellular oxidative stress, calcium metabolism, etc.), so it can induce toxic effects in different organs and systems, and the nervous system is the main target of its toxicity.

What it is used for and where
Cosmetics
Abrasive agent. It contains abrasive particles to remove stains or biofilm that accumulate on the stratum corneum or teeth. Baking soda, kieselguhr, silica and many others have abrasive properties. Peeling or exfoliating products used in dermatology or cosmetic applications contain abrasive agents in the form of synthetic microspheres, however these microspheres or abrasive particles are not biodegradable and create pollution in aquatic ecosystems.
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CAS: 12415-33-7