Clay

Clay

± 1000 yrs. BC-0. Found: Amsterdam, The Netherlands (JN0003-1)

Clastic Sedimentary Rock

Chemical Formula: Al2(OH)4Si2O5

Crystal System: Triclinic

Crystal Habit: Massive, blocky

Mohs Scale: 3,5-4

Tenacity: Brittle, soft or hard

Fracture: Conchoidal, uneven, sub-conchoidal, micaceous

Color: Black, blue, brown, green, grey, orange, red, white, yellow

Streak: White

Luster: Dull

Diaphaneity: Opaque

Clay: Earth, Art, and History

Imagine digging your hands into the soft, cool earth after a rain shower. That pliable material that you can squeeze, mold, and shape is what we call clay. It's a fascinating substance with a history as old as the Earth itself, and it plays a surprisingly big role in our lives.  Let's dive into the world of clay!

What is Clay?

Etymology of 'Clay'

The word "clay" has a fascinating past!  It comes from the Old English word "clæg," which meant "sticky earth."  The word traces even farther back,  possibly to an ancient Germanic root word "klaimos," which also referred to sticky substances.

Clay's Importance

Clay has been a vital material for humans throughout history. Here's why it's so important:

A Look Back: Clay Throughout History

Let's take a quick journey through the long and fascinating history of clay:

Clay is Everywhere!

Clay is a remarkable substance that has shaped human civilization for thousands of years. Next time you squeeze a piece of playdough, admire a ceramic sculpture, or even walk on a brick sidewalk, take a moment to appreciate the amazing story of clay – from humble beginnings in the earth to objects of utility and beauty.