More importantly, quartz crystals can act as time capsules ... meaning they containwater molecules within their structure. This reinforces the idea that Jezero Crater experienced prolonged ...

Chalcedonies include many types of cryptocrystalline quartz gems and feature a number of different colors. Geologists can tell a chalcedony from the arrangement and structure of its crystals.

-Sapphire glass has a large dispersion, which means that light of different wavelengths will experience significant ...

We have now been able to determine the crystal structure of xenon by a method allowing the use of a very small quantity of gas: it was condensed as a very thin layer upon the surface of a quartz ...