AITELEI 1Ib Natural White Calcite Crystal Optical Calcite Iceland Spar Mineral Healing Raw Stones Rough Rock Crystals for Tumbling,Cabbing

Received two nice pieces of Iceland Spar today. the first one is about 1/2 inch thick and clear enough to read through and provides a great example of the refractive qualities. The second one is twice as thick and while you can somewhat see through it at an angle, it does have some cloudiness to it. Doing some research on this particular crystal formation, the original Iceland Spar's were mined in Iceland and were practically clear as glass, however it is now mined in various places around the world such as South America, Mexico, and South Africa. The cloudiness in calcite is typically due to presence of other minerals or impurities. While these are great specimens, I would suspect from the cloudiness that these are from one of the other mining locations and not actually from Iceland; however, it would not be a complete rarity to have cloudy specimens from Iceland as well. That is the nature of calcite. Overall, for the price these are two excellent pieces of Iceland Spar and on the next cloudy day, I will venture outside with my spar to see if I can locate the sun well enough to navigate by.

The crystal was very cloudy and could not be used to see the bifiringet property that optical calcite should have. VERY disappointing. It is cloudy with inclusions

Not as clear as I would like it or as clear as was advertised

Larger than I expected. But it is a good chunk

This product isn't transparent! The advertised pictures show the calcite as being clear enough to see through. This is just junk, cheap calcite. As you can see, these are opaque. Do not buy.

The optical calcite blocks were roughly cut with heavy internal hazing and might be unusable as a viking navigational tool example. Product is not clear as seen in product photos.

It took a very long time to get it, but I was very pleased with the crystals.

The optical calcite advertised is completely clear. The ones I received are not even close. These are by far the worst optical calcite crystals I’ve received from any of the sources I purchased from. DO NOT BUY.