The most unreliable variable in diagnosing the property
minerals such as quartz is their color as it is not consistent with the use of
such external factors. The color could change, that is why it is considered to
be unreliable in diagnosing some of the minerals.
Answer:
I am not aware of anyone being killed by falling airplane parts. In the latest incident parts of the engine cover from the Airbus approaching to land at Singapore fell on the Batam island in Indonesia but did not hit anyone.
