Feldspar -- Rocks and Minerals Series #4

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: Feldspars are a group of rock-forming aluminium tectosilicate minerals, containing sodium, calcium, potassium or barium. The most common members of the feldspar group are the plagioclase (sodium-calcium) feldspars and the alkali (potassium-sodium) feldspars. Feldspars make up about 60% of the Earth's crust, and 41% of the Earth's continental crust by weight.

Feldspars crystallize from magma as both intrusive and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as anorthosite. Feldspars are also found in many types of sedimentary rocks.

About 20 million tons of feldspar were produced in 2010, mostly by three countries: Italy (4.7 Mt), Turkey (4.5 Mt), and China (2 Mt).

Feldspar is a common raw material used in glassmaking, ceramics, and to some extent as a filler and extender in paint, plastics, and rubber.

Congratulations to YamaGypsy and Clusteryfunkery for being FTF !