Quartz -- Rocks and Minerals Series #2

NOT RECOMMENDED AT NIGHT; THIS AREA IS RURAL RESIDENTIAL AND LIGHTS WILL ATTRACT ATTENTION. STEALTH REQUIRED.

BE SURE TO GET THE SINGLE DIGIT CLUE ON THE LOGSHEET FOR THE ROCKS AND MINERALS SERIES FINAL CACHE.

Welcome to the Rocks and Minerals Series, where you can learn a little about geology and find some caches at the same time. Each of the six caches named after rocks and minerals has a single digit on the logsheet that you will need to find the Rocks and Minerals Final Cache. For example, in the Ryolite cache, the Clue will be R = (some digit); in the Quartz cache, the clue will be Q = (some digit).

The final is at N 38 56.RQA W 105 17.FGP

Here are all seven caches in the series:

Ryolite (GC9NYB3)

Quartz (GC9NYB6)

Agate (GC9NYB8)

Feldspar (GC9NYB9)

Granite (GC9NYB7)

Pitchblende (GC9NYBA)

And then – Rocks and Minerals Final Cache (GC9NYBB)

From Wikipedia: Quartz is a hard, crystalline mineral composed of silica (silicon dioxide). The atoms are linked in a continuous framework of SiO₄ silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical formula of SiO₂. Quartz is the second most abundant mineral in Earth's continental crust, behind feldspar.

Quartz exists in two forms, the normal a-quartz and the high-temperature ß-quartz, both of which are chiral. The transformation from a-quartz to ß-quartz takes place abruptly at 573 °C (846 K; 1,063 °F). Since the transformation is accompanied by a significant change in volume, it can easily induce fracturing of ceramics or rocks passing through this temperature threshold.

There are many different varieties of quartz, several of which are classified gemstones. Since antiquity, varieties of quartz have been the most commonly used minerals in the making of jewelry and hardstone carvings, especially in Eurasia.

Quartz is the mineral defining the value of 7 on the Mohs scale of hardness, a qualitative scratch method for determining the hardness of a material to abrasion.

Congratulations to YamaGypsy and Clusteryfunkery for being FTF !