The white variety of quartz, also called milky or snow quartz, gets its color by tiny fluid inclusions of gas or liquid trapped during the crystal formation.  It is a silicon dioxide and has a hardness of 7.

This white quartz is from India.

The name "quartz" comes from the German "Quarz", other sources also say the name is from the Saxon word "Querkluftertz" meaning "cross-vein ore."  White quartz was once used for tool-making, in ceremony and is frequently found placed around stone circles and grave sites. 

Metaphysically speaking, quartz is an amplifier and known as "the stone of power."  It is said to be a master healer, stimulating the immune system and balancing the body.  White quartz in particular, brings good fortune, is a calming and soothing stone and is often used for purification. It is known to be beneficial for the immune system.

Zebra Stone, also called zebra marble, is actually layers of black and white dolomitic marble, giving it the striped appearance.  It is a beautiful stone that takes a nice high polish and has a hardness of 6 to 7.

This Zebra stone comes from Utah
and is great rough for cabbing.

The name Zebra Stone visibly comes from the black and white striped patterns, which are very distinct and imitate the stripes of a zebra.

Metaphysically speaking, Zebra Stone is known to bring compassion and understanding for others, helps to see beyond the superficial and know the loving spirit that exists inside.  It is said to help stimulate energy, stamina and endurance, and encourages us to just enjoy the experience of living - now.  It is also used to treat bone, teeth and gum issues, as well as vitamin deficiencies, muscle spasms and heart palpitations.