When we talk about crystals around here, we’re generally talking about the quartz variety used to make oscillators more stable, or perhaps ruby crystals used to make a laser. We hardly ever talk ...

Evidence for the use of rock crystal - a rare type of perfectly transparent quartz which forms in large hexagonal gems ... a mile south of another dig at Arthur’s Stone. There, they studied a complex ...

Chalcedonies include many types of cryptocrystalline quartz ... form beautiful crystals, but the most prized of all are gemstones. Uncut gems often look fairly ordinary–like rocks.

Gem(stone): A precious or semiprecious stone ... leaving behind dazzling crystals like quartz and amethyst. Crystals also form when heat and pressure cause minerals to recrystallize, resulting ...

Here are our picks for the best rose quartz bracelets on the market. Take a moment to skim this list and pick your favourite ...

Some gemstones are also minerals, such as that classic rock diamond ... which is a variety of the mineral quartz and is often cut into gemstone form. Not all crystals get the gemstone treatment ...