Unlike granite, quartz is not a natural stone material ... How To Bring Old Hardwood Floors Back To Life There are three different types of quartz: first choice, commercial grade, and second ...

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.

Quartz stones are semi-precious gems found in various colors, known for their beauty and energetic properties. Throughout history, different cultures ... Blue quartz is a type of quartz known ...