Block negative energy.
Release patterns that no longer support you.
 
Your pendulum is a rich mix of black Tourmaline (which measures just over 3/4 of an inch) as well as a single piece of rectangular cut snowflake Obsidian. This makes a powerful mixture of crystals for those seeking intense protection and support while dealing with negative energy, patterns and vibes.  The black tourmaline crystal is hand-wrapped in Sterling silver wire, so you could possibly remove it if you wanted to wear just the crystal at times by gently opening the jump ring. 
 
With a dangle length of just over 12 inches, your pendulum has a fabulous swing to it. It's a beautiful dowsing and or divination took to help you to build and follow your own intuition. Hold it by the large heart and watch the double-sided cat swing while resting in the arms of a crescent moon.
 
The chain is silver plated and the connectors are also silver plate wire. 
 
How do I use a Pendulum?
 
Take the time to connect with the pendulum in the same way you might work with a Tarot deck or fortune telling tools. When you feel ready, dangle the crystal over a flat surface and ask it to show you "no". Then "yes".  Note  the direction the pendant swings for each answer. The movement reacts to your subconscious and energy on a personal level. Everyone will have their own movement that attunes to them.