It appears to be a juniper, procumbens nana. They appreciate lots of sun, but afternoon shade is helpful for a tree in a pot. It will want to dry out between waterings. It will do best if outside all year, and definitely needs a dormancy period over winter with temps below freezing, though it's good to protect them from drying winter winds.

ez

Thank you so much for your quick response! Based on the information you provided I have to ask if it is possible to sustain the life of this tree indoors?

Probably not. Look at Bonsai4me.com under 'species' for more info. and if the pebbles on top are a glued-on layer, pry them off and level off afterward with soil. There's a lot to learn about soil mixes, climates, sun, and especially watering, so don't be discouraged if things don't go well with this tree, but good luck.