The Ruby Amulet of strength is an enchanted amulet that increases the player's weapon power. This combined with its low price makes it a popular amulet for new players. It can be made by casting enchant lvl-3 amulet on a ruby amulet.
The amulet is the best in slot for pure damage: both Diamond Amulet of power and Dragonstone Amulet boost power by 6. Therefore, it can be useful even for higher level players who are fighting monsters with low defense, when accuracy is no longer an issue.