Elements of Harmony

The Elements of Harmony are a collection of gemstones with great power, embodied in the characters and personalities of the mane six.

These are:
 * Twilight Sparkle - the Element of Magic
 * Pinkie Pie - the Element of Laughter
 * Applejack - the Element of Honesty
 * Rarity - the Element of Generosity
 * Fluttershy - the Element of Kindness
 * Rainbow Dash - the Element of Loyalty

Elements of Harmony Shards
Throughout My Little Pony you will find shards of the elemental stones. These are needed to activate the Harmony Stones, which are in turn used to defeat Nightmare Moon.

Harmony Stones
The Harmony Stones are small shrines dotted around the landscape, each with a symbol representing it's element on it. These stones need to be activated by Elements of Harmony Shards.

After the Harmony Stone has been activated, it can be used to trade Element Shards for bits and (rarely) gems.