In its cluster form Apophyllite can look quite a bit like a Clear Quartz cluster. In this article and video I am going to teach you what to look for so that you know for sure which beautiful clear crystal you have in your collection.
Color and Mineral Content:
Apophyllite: Apophyllite can be found in the following colors: Colorless, white, gray, green, brown. Rarely pink, purple, red, or orange. The most common ones that you will see include colorless/white and green. This article focuses more on the colorless (clear) to white Apophyllite. Apophyllite is a member of the Zeolite family and can often be found growing with other Zeolites such as Stilbite. Apophyllite is tetragonal. (Three axes, two are equal in length, one is unequal. All three axes are at 90° to each other.) The easiest way to tell it apart from Quartz is that it has 4 sides where as Quartz as 6. Apophyllite has the chemical composition of (K,Na)Ca4Si8O20(F,OH) · 8(H2O) (Hydrated Potassium Calcium Sodium Silicate Fluoride Hydroxide). (Click here to read more about Apophyllite.)
Clear Quartz: Quartz can be found in the following colors: Colorless, white, purple, pink, brown, and black. Also gray, green, orange, yellow, blue, and red. For this article I am focusing on the colorless/white “Clear Quartz” since it is often confused with Apophyllite. Quartz is hexagonal. (Four axes, three are equal in length and lie at an angle of 120° from each other. The fourth is either longer or shorter but must be at a right angle toward the other corners.) Clear Quartz has the chemical composition of SiO2 (Silicon dioxide). (Click here to read more about Clear Quartz.)
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