Doomsday Device or just some fancy-dancy decoration. In at least several occasions, an Uncle Pennybags will simply show off the jewels in question as proof of his wealth. But some people prefer showing off their shiny jewels the violent way, mostly in the form of projectiles. And considering that they're much harder than ordinary rocks, painful injuries will most certainly ensue...big time. May be the result of the ability to turn body parts into gems. A Sub-Trope of Dishing Out Dirt (since gems are still from the earth). Compare Elemental Embodiment (when the being itself is made out of jewels and decides to land a physical blow), Power Crystal, Mineral MacGuffin. Contrast Crystal Prison.
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Anime and Manga
- Guren, a Filler Villain in the Naruto anime, had the ability to crystalize any material and turn it into weapons, such as creating snowflake-shaped shurikens from the moisture in the air.
- Jojo's Bizarre Adventure: Kakyoin's Stand, Hierophant Green, has a technique called Emerald Splash, where it secretes green liquid from its hands that then crystallizes into gems which are then fired in rapid bursts.
- Fate/stay night: Rin Tohsaka's magic involves gems filled with mana which are used as medium for spells like detonating thrown gems.
- Digimon Tamers: This is Renamon's primary technique, 'Diamond Storm'. Much like the Diancie example below, it involves summoning a Flechette Storm of gems and launching them at the opponent.
- The Gem Knight archetype in Yu-Gi-Oh! are knights with gem-like armor. They can fuse together and become more powerful. Gem-Knight Crystal is their leader and he has the most fusions. The strongest is Gem Knight Master Diamond. He later becomes Cairngorgon, Antiluminescent Knight, and then El-Shadoll Egrystal.
- X-Men 2099 gives us Crystalline, a mutant capable of growing beautiful crystals out of nowhere. When in a good mood, she just grows them around enemies to trap them but she is fully capable of projecting them as a torrent of razor-sharp shards.
- Captain America villainess (and sometimes girlfriend) Diamondback uses diamonds as throwing weapons... fake ones, of course.
Live Action TV
- Star Trek: The Original Series episode "Arena": Captain Kirk used a primitive cannon to fire diamonds at the Gorn.
- Dungeons & Dragons
- One possible result of using a Wand of Wonder was firing a stream of 10 to 40 gems at the target, each doing 1 Hit Point worth of damage.
- In Dark Sun metals are scarce, so obsidian is a typical material for cutting and piercing weapons.
- Greyhawk has Nystul's Crystal Dagger spell and its improved version, Nystul's Crystal Dirk. They create temporary enchanted weapons that can stun undead and fiends. Otiluke’s Diamond Screen is a relative of Blade Barrier, a glittering wall of summoned razor-sharp shards.
- Stormbringer/Elric!. Olab throw crystal disks at their opponents using a club-like launcher.
- In Castlevania: Symphony of the Night, one of the weapons that you can get early in the game (provided that you stand still in a hole that you just made in the wall for several seconds) is the jewel knuckles, which will remain your most powerful weapon for some time.
- Some of Pit's weapons in Kid Icarus: Uprising fire jewels, such as the Royal Blade and the Crystal Bow.
- Both Crystal Man from Mega Man 5 and Jewel Man from Mega Man 9 use gem-based attacks. The Crystal Joe from the former's stage also does this.
- Crystal Snail's Crystal Hunter from Mega Man X2, though it's more of a Crystal Prison type weapon.
- Mega Man X8 has Earthrock Trilobyte's Crystal Wall weapon.
- The Gem/Diamond Missile spell from the World of Mana series.
- As one of the D-Link abilities in Kingdom Hearts Birth By Sleep, Snow White uses jewels as weapons.
- Final Fantasy has several weapons made out of gemstones, up to including the Diamond Sword.
- The Jewel Bag from Dragon Quest.
- The Crystal Knight enemies from the Lunar series can attack you with crystal-like projectiles or attack from above with its lower torso, which just so happens to be a crystal.
- The Pokémon move "Power Gem" is this, though it involves channeling light via gems. Also, it counts as a Rock-Type attack.
- There's also the event legendary Diancie, whose signature move Diamond Storm is a Flechette Storm of diamonds.
- Many high level clubs in World of Warcraft are made of glowing crystals — sometimes the weapon consists of a handle with crystals floating around it. Somehow they are very efficient.
- A few rock giants are actually made of crystal and may throw pieces at you or trap you inside gemstones.
- Dead Rising lets you throw a bunch of diamonds at zombies. It's mainly just for stunning them, though.
- Some of the danmaku in Touhou is described as this. And a fair amount looks like it, since diamonds are one of the most common bullet types.
- The Power Customization in City of Heroes allows you to change Earth-based Powers into Crystal-based Powers. It's purely cosmetic, however.
- Within Nethack, gems can be thrown, but make bad improvised weapons. The main benefit is that valuable gems can be identified from glass by throwing them at unicorns, which also increases your Luck Stat.
- In Dwarf Fortress Adventure Mode, gems can be thrown with deadly effect up to and including severed limbs. Much like anything else in the game.
- Several of Mimi's attacks in Super Paper Mario involve hurling rubees at you, which you're encouraged to pick up and throw right back at her.
- Chenjesu in Star Control are living crystals and make almost everything from crystals. Their ship weapon is "Photon Crystal Shards" — big gem-like bombs that are near-impossible to intercept, cause great damage with direct hits and even when miss explode in shrapnel.
- Unreal I has Stinger, the weapon shooting crystal shards like a machinegun.
- A major aspect of Rarity's playstyle in the fangame My Little Pony: Fighting Is Magic . She can delay gems, straight up launch them, cause them to erupt beneath her opponent, or just summon a massive storm below them.
- Rarity (rechristened Generous Mare) also uses gems to fight in the fangame Mega Pony. She can use gems as explosive mines, launch them at the opponent, or surround herself with a shield of them. After beating her, Mega Pony gains the ability to similarly use gems as a shield and launch them at his foes.
- Tyrian has the Secret Level GEM WAR, where you fight a bunch of ships that shoot destructible (and sometimes homing) gems at you.
- Taric the Gem Knight from League of Legends wears armour made out of gems, carries a large gem-studded shield and wields a massive hammer studded with sharp gems. His gems are the source of his magic and he can both stun enemies with a dazzling blast of light from his shield and cause his crystalling aura to shatter explosively, shredding nearby enemies, as well as buff up nearby allies with the power of his radiance.
- Diamond swords are top-tier weapons in Minecraft. Other diamond tools (axes, picks, etc.) can also be used as weapons, with varying degrees of effectiveness.
- Crystalisks in Borderlands 2 can launch a Flechette Storm of crystal shards at the player, or a timed, explosive crystal that acts like a sticky bomb.
- FTL: Faster Than Light features extremely rare weapons that fire human-sized chunks of crystal at enemy ships. These crystals can pass through low-level shields and will generally wreck ships like no one's business.
- The Crystal race (obtained from a long sidequest, see below) throw crystals as a ranged attack when facing non-adjacent foes.
- In fact, a ship made out of crystals is the reward for a ridiculously convoluted and RNG dominated sidequest, starting out the game with it will tear everything apart well into the late game.
- Fallen London has a much more standard version of this justifying exactly why a particularly expensive Diamond Ring ups your fighting capability as well as your persuasiveness. Anyone who's ever gotten punched by someone who didn't take off their jewelry can attest to why.
- Oddly, Daisy forgoes the Green Thumb she usually has in sports games for the power to cause crystals to rise from the ground and punch the ball with a crystal fist in Mario Strikers Charged.
- Fate/stay night has Rin Tohsaka, practitioner of Jewel Magic. Usually, the jewels are just charged up with a bit of magic everyday to supply greater amount of energy when needed, but they also make good explosives. This also explains why she's such a miser.
- Her Finnish Rival, Luvia, also uses jewels. This is because Rin's ancestor defeated the twin sister of Luvia's ancestor in the Third Grail War and stole their family's magic.
- One Darwin Award winner met his death in a crystal cave. He tried to steal a beautiful crystal stalactite and managed to break it off the ceiling... while standing directly underneath.
- Shard, a supervillain from the Global Guardians PBEM Universe, is made of living diamond. One of her powers is spraying a cone of sharpened diamond chips at her opponents.
- The Sinister Circle is a group of mystically-inclined villains who each get their power from one of a set of magical gemstones. These guys are evil with a capital EVIL, to the point that even the degenerates in All Hallow's Eve and the Hellfire Club avoid them out of fear. Bloodstone lives up to his name with "blood control" powers; Diamond has force powers; Obsidian has darkness powers; and Tourmaline has fire powers.
- The SWAT Kats episode "Chaos in Crystal" had an escaped convict named Rex Shard use a Body to Jewel variant of this after becoming a crystal himself.
- King Sombra, the villain of the My Little Pony: Friendship Is Magic episode "The Crystal Empire", seems to have for his main power to grow huge, spiky crystals out of the ground.
- Technically, Twilight Sparkle has learned that magic, but it works by manipulating the crystals of the Empire, making it of limited utility elsewhere.
- The Crystal Gems of Steven Universe are Ageless Magical Girl Warriors. They even have Theme Naming: Garnet, Amethyst, Pearl, (formerly) Rose Quartz and her son Steven.
- It later turns out the ones we're watching are an ancient splinter cell, and there are more Gems out in the universe. Lapis Lazuli was trapped in a mirror as a sort of Wetware CPU. Peridot later traveled from the Gem Homeworld to Earth to repair a galactic teleporter from thousands of years ago; and when she found out about the Crystal Gems here, she brought the brutal militaristic thug Jasper to help take the CG team back to face Homeworld justice.
- Diaspro from Winx Club seems to have power over gemstones as she attacks Bloom with them each time they fight.
- Both the heroes and villains of LoliRock have the power to summon crystals as their main methods of attack, with both a Projectile Spell variety and the ability to summon it out of the ground.
- Diamondhead and later Chromastone in Ben10.
- Obsidian, a type of volcanic glass, has been used as the cutting part of weapons.
- Amazingly enough, obsidian shatters in such a way that its edges are sharper than the sharpest metallic blade. It is occasionally used for surgical instruments nowadays since it leaves very clean and neat wounds because of that.
- Jade (particularly the nephrite variety) is unbelievably tough, so much that few forces possible for a human being can actually crack it, even today. (Strangely, despite it's toughness, it's slightly soft. It can't be cracked but it can be ground to shape, by diamonds.) Jade is so invulnerable to impacts that ancient Chinese artisans would make anvils of jade for blacksmithing. Consequently, many weapons and even suits of armor have been made of jade, so much that jade is called axestone in some cultures.
- Using jewelry as knuckle-dusters seems a little financially counterintuitive, but it can be done, and leaves some painful-as-hell marks.