Alexandrita Stock 1 Quartzite works very well in kitchens and bathrooms, and can also be cut into beautiful floor tiles or used to pave patios and gardens. Quartzite is a metamorphic rock that originates as sandstone, and usually varies in color from white to gray. It is so strong, that it is often used in construction of walls and floors, and is commonly used as railroad track ballast. This stone is very durable, but its breathtaking beauty makes it a popular choice in home decoration. Alexandrita Stock 1 Quartzite is known for its ability to add both beauty and functionality to the inside or outside of a home.