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mineral

A Tryst with Amethyst

23 Feb 2021

An attractive amethyst geode sits on my desk. Geodes are rocks with an internal cavity that is filled with crystals of a mineral. In the case of amethyst that mineral is quartz, tainted with iron...

Creams Deliver More Hype than Evidence

20 Mar 2017

In the 1980s, Dr. Albert Kligman, an American dermatologist  made an interesting observation.  Patients being treated for acne with retinoic acid saw an improvement in their wrinkles, an...

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