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Anime & Manga
- Beast King Golion (The original source of Lion Voltron) has the original five pilots with surnames which are types of metal: Akira ("Keith") Kogane — "gold", Isamu "Lance" Kurogane — "iron", and so on. (Princess Fala/"Allura" doesn't fit into the scheme.)
- CLAMP's four-volume series Wish uses this for the majority of named characters. The theme is precious and semi-precious stones. Names include: Kohaku ("Amber"), Hisui ("Jade"), Ruri ("Blue Glass"/"Lapis-lazuli"), Hari ("Crystal"), Koryuu ("Garnet"), Kokuyo ("Obsidian"), Sango ("Coral"), and Shinju ("Pearl"). There may be more.
- In Inuyasha, the three characters from the youkai exterminator village who are actually named all have names related to semiprecious stones: Sango (coral), Kohaku (amber), and Kirara (mica).
- The first movie introduce the villain Menomaru (agathe), with his goons named after crystal and glass.
- Magnes is Latin for "lodestone", or magnetic iron. One example of an entity named for such is the Wizard in Mega Man Star Force 3 - the one piloting the rocket that almost blew up at Echo Ridge Elementary and which Mega Man uses to transfer into Meteor G at game's end.
- Sailor Moon's villains are frequently named after minerals or jewels, with varying obscurity. Some groups of villains have their own theme, e.g. the Shitennou's names all end in "ite", the Black Moon Clan members are named after precious stones, etc.
- From the Dark Kingdom: Beryl, Jadeite, Nephrite, Zoisite, and Kunzite.
- From the Black Moon Clan: Demande, Rubeus, Esmeraude, Sapphir, Koan, Beruche, Petz, and Calaveras.
- From the Death Busters: Kaolinite, Eudial, Mimet, Viluy, Tellun, Cyprine, and Ptilol.
- From the Dead Moon Circus: Zirconia, Tiger's Eye, Hawk's Eye, Fisheye, Zircon, Xenotime and Zeolite.
- From Shadow Galactica: Sailor Iron Mouse, Sailor Aluminum Seinen, Sailor Lead Crow, Sailor Tin Nyanko and Sailor Heavy Metal Papillon.
- In Shaman King, several of the Native American shamans are named after metals: Silva (silver), Goldva, Kalim (from kalium, the German word for potassium), Nichrome (who has a brother named Chrome), Bron (bronze), Rutherfor (rutherfordium), and Zinc.
- In Tsukihime, the Meido twins are named Hisui (Jade) and Kohaku (Amber).
- The manhwa Les Bijoux used this in spades. The main character had a Literal Split Personality - he was Lapis, she was Lazuli, and both of them hated prince Sapphire (well, Lazuli a tiny bit less, to his/her confusion and anger).
- In Cardcaptor Sakura, Eriol's guardians/servants, Spinel Sun and Ruby Moon, are both named after gemstones often mistaken for each other.
- Yaiba has the First Class Soldiers in the Pyramid arc named after precious stones (Sapphire, Ruby, Emerald and Diamond). Plus, when they combine they form a being called "Jewel". In the following arc, the giant ultimate soldiers created by the same people who made the above mentioned girls are named Gold and Silver.
- Word of God revealed that the true names of Dragon Ball Z's Androids 17 and 18 were Lapis and Lazuli, respectively.
- Love Live! Sunshine!! has the Kurosawa sisters, Dia and Ruby (Dia's name is short for "diamond").
- Due to the fact Pokedex Holders are named after the Pokémon games, most of the main characters in Pokémon Adventures use this. Crystal, Ruby, Sapphire, Emerald, Diamond, Pearl, and Platinum all count.
- Marvel Comics's Crystar Crystal Warrior is made of this trope. Names include Crystar, Moltar, Feldspar, Ambara, Stalax, Ogeode, Malachon (for Malachite), and their whole planet is named Crystallium.
- Similarly, DC Comics' Amethyst, Princess of Gemworld.
- In Sonic Universe, Silver meets a new character named Gold. They both have Psychic Powers (Silver has telekinesis, Gold has telepathy), semi-identical markings on their hands (Silver) and forehead (Gold) and they are both trying to save their universe from destruction.
- In Shining Pretty Cure, not just with the main heroines and the mascots, but the locations, which show a heavy light and gemstone motif. The story is set in Luminous Town, they attend Bright Academy, and congregate at Gemstone Park by Lake Lapis...
- All the Phoenix Corporation Agents in Akatsuki Kitten: Phoenix Corporation Overhaul have a Jewel-based codename, which have been adopted as their actual names in many cases. There are only three that don't: Agent Chimera (Tiger's Eye) and Agent Nightingale (Pearl and Obsidian) consider their jewel-based codenames to be too long and cumbersome for everyday usage. Agent Silk, for reasons unknown, keeps his hidden from everyone. The only person to actually know his is the author, and she's not telling.
Films — Live-Action
- Used in Akira Kurosawa's film August Rhapsody (the one about Nagasaki, with a guest appearance by Richard Gere as a half-Japanese pinapple company heir), when the Grandmother is listing all the metal-themed names of her siblings (Gin/silver, Kin/gold, Tetsuo/iron, etc... there were a lot of them) to jog her memory and see if Gere's character's recently deceased father could be among them, to the greedy hope of the Grandmother's grown children.
- In the Hellboy films, the redshirts at the BPRD all have mineral-themed names such as Steel and Flint.
- In Gene Wolfe's Book of the Long Sun, robots are named after gems, metal, or rocks, while human males are named after animals or animal products (e.g. the main character Silk) and human females are named after plants (e.g. the love interest Hyacinth).
- In the Discworld books, all trolls are named in some way after rocks or minerals. Female trolls tend to have the names of precious stones, whereas males tend to be named after more mundane minerals. (One book, however, features a troll called Big Jim Beef. This is explained as a "macho" nickname, similar to a human being called Rocky.)
- In J. R. R. Tolkien's Middle-earth (The Lord of the Rings, etc), the hobbits do have an acknowledged tradition of most often naming females after flowers or gemstones: e.g. Diamond Took, Esmeralda Brandybuck or Ruby Gamgee.
- In Double Act by Jaqueline Wilson, the protagonists are twins called Garnet and Ruby. Their mother was called Opal.
- In Flavia Bujor's The Prophecy of the Stones the heroines are called Jade, Amber and Opal.
- In the Bardic Voices series by Mercedes Lackey, Rune has a job as a musician at a brothel where all the ladies working there take on names after gems. The Madam goes by Amber, and the other ladies are called Sapphire, Pearl, Topaz, Ruby, Diamond, and Amethyst. In a similar manner, all members of the Free Bards and their allies are named after birds.
- In Nina Kiriki Hoffman's book A Fistful of Sky, the five kids in the LaZelle family are all named after minerals or precious stones. The girls are named Opal, Gypsum, and Beryl, while the boys are named Jasper and Flint. It is implied that this is a family tradition, as they have cousins named Amethyst and Chalcedony.
- The Ordinary Princess: All seven royal daughters of Phantasmarania are named after jewels: Diamond, Opal, Emerald, Sapphire, Crystal, Pearl, and Amethyst.
- There are MANY Latin-Amrican telenovelas whose protagonists are named after gemstones and then give the soaps their names.. These are: "Esmeralda" ("Emerald", about a Naďve Everygirl who was Switched at Birth with the guy who'd become her love interest), "Topacio" ("Topace", actually a remake of "Emerald", about a blind Ill Girl who also was Switched at Birth), "Cristal" ("Crystal", about a girl named Cristina aka Cristal and her long-lost mother Victoria), "Rubí" ("Ruby", with a Gold Digger Anti Heroine), "Perla Negra" ("Black Pearl", about a girl named Perla who pulls a Dead Person Impersonation to defy the local Big, Screwed-Up Family and protect her dead best friend's son)...
- When they're not using Animal Theme Naming, Australia's national sports teams (especially women's teams) tend to do this:
- Opals (Women's basketball)
- Sapphires (Women's under-21 basketball)
- Gems (Women's under-19 basketball)
- Pearls (Women's intellectual disability basketball)
- Diamonds (Netball)
- Tales of Hearts has its main characters named after minerals: Shing (last name Meteoryte), Kohak, Hisui, Innes Lorenz(inite), Beryl Benito, and Kunzite. For those of you who missed it, Kohak and Hisui are sister and brother, and their names are Amber and Jade respectively in Japanese. Supporting characters are named Chalcedny, Peridot, Byrocks, Paraiba... and the old party contains names like Iola, Tekta, and Labrado(rite)... and the Big Bad is Creed Graphite. Early-game villains are named Grossular and Kornerupine, while the Big Bad's posse consists of Corundum, Clinoseraph, Chlorseraph, Geo Strigau, and Incarose. Look them all up.
- The Jumi in Legend of Mana are all named after the gemstones in their cores. So when you run into a Jewel Thief named Sandra, a Gem Merchant named Alex, and hear of a Jumi Knight called Alexandrite, it's not hard to put two and two together.
- Several game titles feature this. Second-generation games Gold, Silver, and Crystal; third-generation games Ruby, Sapphire, and Emerald; and the fourth-generation games Diamond, Pearl, and Platinum. These names carried over to some characters in the manga.
- Most Gym Leaders have names referencing their type specialty, so Rock-, and Steel-type Leaders fall into this as well: Brock, Jasmine, Roxanne (but not Roxie, who's a Poison-type Leader), Roark (similar to both "rock" and "ore"), Byron, and Grant ("granite"). This could also extend to Ground-type Leader Giovanni, referencing "geo," though counting the other Ground specialist, Clay, would be pushing it.
- Many rock/ground Pokemon named this way. Examples include Geodude, Graveller, Sandslash, Sandshrew, Regirock, Lunatone, Solrock.
- As for Japanese names, from the fifth generation, there's Ishizumai and Iwaparesu. "Ishi" is "stone" and "Iwa" is "rock". Their English names are Dwebble and Crustle (as in Earth's crust- it literally carries a chunk of crust on its back!).
- Pokémon Colosseum and XD have the Orre region, which is derived from "ore". Then there are the individual location names: Phenac City (phenacite), Pyrite Town, Agate Village, and Realgam Tower (realgar).
- In the KOEI crossover game Warriors Orochi, the large boar-like generals (with the exception of Gyūki) are all named after minerals such as Feldspar and Galena.
- In Tales of the Abyss, we have Jade, his sister Nephry (Nephrite), and childhood friend Saphir (Sapphire). In a manga bonus chapter, Jade and Saphir are seen going to school with a young man named Jasper, all of which suggests that these kind of names may be somewhat traditional in Malkuth.
- One of the female love interests in Story of Seasons is named Agate.
- This may be at play in Dragon Age: Origins, but not overtly. The surname of the Dwarf Noble Warden is Aeducan, from the old dwarven word aeduc, which means either "shield" or "stone."
- Karin-dou 4koma: Seren named Kinka and Ginka (coin youkai) after their coins' metal — gold and silver, respectively. At one point, Mifi wonders if the naming scheme would have continued if Tamaryu were a coin youkai instead of a dragon, with a name like "Douka" (corresponding to copper). Kinka and Ginka deem it very likely.
- The Ménage ŕ 3 spinoff Sticky Dilly Buns features sisters Amber and Ruby, hitting this and Colourful theme naming
- In Monsterful the entire Gem family have literal jewel names, Sapphire, Ruby, Onyx, Topaz, Diamond and Pearl.
- The Flintstones (as well as the Rubbles, Mr. Slate, Joe Rockhead, etc.). Hey, they are a modern stone-age family.
- The Guatemala Clan in Gargoyles are named Zafiro, Turquesa, Obsidiana, and Jade. They're Spanish, but you can probably figure out what they mean.
- The main girls in Trollz are named for jewels: Amethyst, Ruby, Topaz, Sapphire, and Onyx. There are also other characters named for regular stones: Shale, Mica, Coal, Rock, and Jasper are just a few examples.
- The Crystal Gems in Steven Universe are named Garnet, Amethyst and Pearl, with Steven's mother Rose Quartz being a former member. This extends to their entire race, and each has a gemstone which resembles their namesake and is their actual body.
- In My Little Pony: Friendship Is Magic, rock farmers Igneous Rock and Cloudy Quartz have four children: Marble Pie, Limestone Pie, Maud Pie, and Pinkie Pienote .
- Pearlie had a mild case of this, with the main characters being named Pearlie, Opal, Jasper, and Sapphira.