Starfire Gems (Tenko & The Guardians of the Magic)
The Warpstone (Warhammer series)
Legendary Silver Crystal (Sailor Moon)
Pip Crystals (My Life as a Teenage Robot)
Juggernaut (Marvel) gains his near unstoppable strength from bonding with the powerful Crimson Gem of Cyttorak.
Nemesis (Marvel Comics) as the living physical embodiment of the Infinity Gems, possesses all their powers of Space, Time, Power, Soul, Reality, Mind and Ego.
Pip crystals (My Life as a Teenage Robot) are highly powerful and dangerous artifacts in the universe.
The Power Stones (ThunderCats 2011) are four mystical stones that grant special abilities once they're fused to a weapon, or a piece of armor. From left to right: War Stone/Eye of Thundera, Tech Stone, Spirit Stone and the Soul Stone.
Tenko and her friends in their super-powered forms granted by their respective Starfire Gems. From left to right: Bolt, Steel, Tenko and Hawk.
The Chaos Emeralds (Sonic series) are a set of supernatural gems that allow the user to do varying things from powering machinery, controlling space-time, to gaining the ability of transformation.
The Master Emerald (Sonic series) has/grants the user the ability to nullify the powers of the Chaos Emeralds and keeping them in check.
The Eidoliths (FFXIII) are crystalline items which Lightning and her party use to summon forth their respective Eidolons into battle.
Crystals (Final Fantasy) are legendary elemental stones and objects that have power over natural phenomena, and function as a powerful source of magical energy. Many antagonists focus their efforts on seizing the crystals to gain power towards their goal.
Warpstone (Warhammer series), also known as wyrdstone, is solidified Chaos. As the raw stuff of Chaos it is the ultimate magical substance and greatly sought after by the followers of Chaos.
Jewel Girl (Valkyrie Crusade) has the ability to manipulate gems, and as well derive and use special powers of every gem.