You'll get 4 tumbled pieces in a pouch, sizes are 1/2 to 1 inch, shapes and colors vary, but all nice pieces.

Aventurine is known as the "Stone of Abundance & Opportunity"

Green in nature, but truly is a form of quartz with natural micas and coppers that turn it a fluid greenish color, although other colors exist, green is the most popular.
It's a stone of tipping scales in your favor when carried with you, to make luck work in your favor.

I personally carry a piece in my left pocket (along with other items)

it's involved in all money workings, and manifesting work. It is also smashed in to a powder and used in many of my candles and oils.