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Mineral of the Week
News and CommentsWinter has arrived and with it cold temperatures. Most minerals will tolerate a wide range of temperatures, and will survive shipping during the winter. But many minerals will NOT tolerate rapid temperature changes. I was setting up at a mineral show once, and brought indoors flats full of minerals that had sat in my car in the cold. As I set up my booth I placed a blue topaz crystal from Brazil on a light box to show the transparency. After a few minutes the topaz crystal spontaneously cleaved and the upper half popped up in the air 10 cm and fell to the floor. The rapid change from cold outdoor temperature to a warm light box caused the internal stresses to split the crystal. Minerals that have pronounced cleavage planes, like topaz, fluorite or calcite, will easily cleave if exposed to fast temperature changes. If a mineral package sat in the back of the mail truck or your mailbox, and has adjusted to cold temperatures outside, then it should not be brought inside and exposed to warm room temperatures immediately. Let the mineral sit in the box for at least two hours, longer if you can. This will allow the mineral to slowly adapt to room temperatures and should prevent any damage from thermal shock. John Betts, 12/10/2019 Click here to read past news and commentaries...
Customer Feedback:"Just an FYI. Received my 7 specimen mineral order today for the very reasonable price of $240, after your multi specimen discount. That is a little more than $30 per specimen on average. While these were all small miniatures, I thought the quality was excellent from a lack of damage perspective, uniqueness for location crystal morphology perspective. (and the price was great for that). Any beginner or moderate-skilled collector would greatly benefit from the addition of these specimens. I consider myself an advanced collector, and this suite really made me happy and hit the mark with me for what they are in size. I have spent very much more $$$ on “high quality” larger specimens. These in their own way, in my opinion, hold their own in the collection for reasons mentioned. Maybe I am over the top on this, but I very much like what I received. Thanks. Dan M." Click here to see other comments about this site by customers. Also add your feedback...
Pledge to My Customers:Customer satisfaction is my primary goal. I pledge:
John H. Betts, owner
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