Sun Stone

A Sun Stone is a Hardmode, post-Golem accessory which has a 12.5% (1/8) chance to drop from the Golem boss. It grants the same stat bonuses as the Moon Stone; however, these bonuses only activate during the day.

The stat bonuses are:
 * +10% melee speed
 * +10% damage (all types)
 * +2% critical strike chance
 * +1 HP/s life regeneration
 * +4 defense
 * +15% mining speed
 * +50% minion knockback

Trivia
The Sun Stone and it's counterpart, the Moon Stone could be a reference to Castlevania: Symphony of the Night, in which there are items with similar names, looks, and powers.