This is a nice little crystal cluster with calcite matrix...... it's about 2 inches long, 1 1/2 inches wide at the widest point and about 1 1/4 inches tall at the tallest point. 

It has tiny, tiny specks of ....hematite?, or iron ore? or some dark mineral included, hard to see with the naked eye. Looking through jeweler's magnifier it looks like it has pepper sprinkled inside the crystals.  Interesting, but mysterious..... =)  It has lots of "baby" points which gives it a very sparkly effect when you turn it in the light, and you catch some rainbows every now and then.   A nice piece for display or if you're into healing stones it's a very "energetic" stone.  

*(Any reference to mystical or healing properties is purely for entertainment purposes.)

 Quartz is a power stone that harmonizes and balances. It enhances energy and thoughts, and purifies the spiritual, mental, and physical. It is also a powerfully protective stone, bringing the purified energy in. Historically this crystal has been used to counter black magic, to perform diagnostic healing, and to communicate with spirits and other worlds.*