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Hi all. I had 2 initally clear white quartz pillar but recently since November after decided to end my previous career, both pillar start to have white powdery substances forming on the surface of the quartz and after wiping it, I realise the interior were also getting cloudy. Just for information, I had placed my quartz pillar with my small quartz stone cluster and 2 small amethyst stone cluster with 1 pillar of black obsidian and yellow topaz. I don't think it was dust as if it was dust, it will show up very clearly on my black obsidian.
Beside these 2 pillar of white quartz pillar, the White phantom crystal pendant that I wore daily also show signs of cloudiness inside.

Is there ways to clear up my quartz? and what could be causing these changes? As the shop that I brought my crystals mentioned they were unaware of such occurrences.