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Color-Coded Stones
This is a visual shorthand trope that makes gems identifiable on sight, often reducing gems to Palette Swaps of each other. In Real Life, there are many features that differentiate minerals, gemstones, precious metals, and organic gems from each other: hardness, smoothness, clarity, a range of possible colors, and location found. But the only feature the audience can directly see for themselves, and that most people outside of geologists are readily familiar with, is color. Therefore, gems in fiction will often be identified solely by color, with a standard set of gem-color associations dictating the types of gems. The gems may be identical aside from the differences in color.

Generally, the code is as follows:
  • Ruby: Red
  • Sapphire: Blue
  • Topaz: Orange (or Yellow)
  • Amber: Yellow (or Orange)
  • Emerald: Green
  • Amethyst: Purple
  • Onyx: Black
  • Diamond: White or clear, possibly with light blue or yellow mixed in
  • Gold: Yellow, orange, or tannish
  • Silver: Medium to light gray, possibly with a little blue mixed in (often trading places with platinum in regards to which is light gray and blue-gray.)

See also the Birthstones in the Real Life section for more.

Often these gemstones are seen together as a set of Mineral Macguffins. When it's more generalized (i.e. all red gems are rubies, all orange gems are topaz all the way down the rainbow), it's never brought up why there's so much mineral diversity in one area. If a gemstone is not the usual color, that is usually a plot relevant detail.

If there's gemstone Theme Naming going on, this trope functions in essentially the same way as Color-Coded for Your Convenience. "Ruby" is synonymous with "Fancy Red" and so on. This may also double as Fancy Color Coded Elements, such as having a Fire Ruby.

A subtrope to Color-Coded for Your Convenience for gemstones. It can be related to One Steve Limit, Color-Coded Characters and Color-Coded Elements. A sister trope to All-Natural Gem Polish.


Examples

    open/close all folders 

     Anime And Manga 
  • Yugioh GX has the Crystal Beasts, a group of monsters that are based on the following Gemstones:
    • Ruby Carbuncle: Red
    • Amber Mammoth: Orange
    • Topaz Tiger: Yellow
    • Emerald Tortoise: Green
    • Sapphire Pegasus and Cobalt Eagle: Different shades of Blue
    • Amethyst Cat: Purple

     Comic Books 

     Literature 
  • Played with somewhat in The Stormlight Archive, where there are ten gemstones used in Soulcasting; each gemstone can transmute a certain element, and the association is based mainly on the commonality of colour between them. In order, with colours and elements listed, the gemstones are: Sapphire, blue, any clear gas. Smokestone, black, any opaque gas. Ruby, red, fire. Diamond, white, crystal. Emerald, green, plant matter. Garnet, rusty red, blood. Zircon, yellow, oil. Amethyst, purple, metal. Topaz, brown, stone. Heliodor, golden, flesh.

     Live Action TV 
  • Averted in Kamen Rider Wizard: Wizard has a set of jewelled Rings Of Power that are color-coded to each of his forms, but the gems are never actually identified as ruby, sapphire, etc.; in fact, they all seem to be variations of the same material, which is simply called "magic stone". (Except for the diamond-like Infinity Ring, which formed from his tears, or, somehow... it's magic, okay?) Fans may still use "ruby", "sapphire", "emerald", "amber", and "diamond" to describe them, however.
  • In an episode of Law & Order: Special Victims Unit, Casey Novak catches a suspect in a lie on the stand with this. The suspect says she was born in January, but Casey notices the class ring she's wearing wasn't a red Garnet, but a blue Sapphire (the victim's ring.) It also never occurred to Casey that some schools let students choose gems based on school colors, either.

     Music 
  • Aoki Lapis is named for the Lapis Lazuli Gemstone and has a color scheme of blue and purple.

     Tabletop Games 
  • Yu-Gi-Oh! has the Gem-Knight cards (a Homage to the Elemental Hero archetype and the above-mentioned Crystal Beasts) which are named for and usually colored after a Gemstone (The exception is Gem-Knight Lazuli and maybe Gem-Knight Sardonyx) Their leader Gem-Knight Master Diamond has white armor and an All Your Colors Combined Rainbow Motif sword and background.

     Video Games 
  • F-Zero GX: The four racing cups are Ruby, Sapphire, Emerald and Diamond. Red, Blue, Green and a pale Yellow respectively.
  • Zig-zagged with The Legend of Kyrandia: Book One. In addition to having all the common gemstones and colors, the game includes a variety of other jewels, as one puzzle revolves around birthstones. One of the first items the player can pick up is a bright red garnet, and the first green-colored stone the player is likely to see is a peridot. The rubies and emeralds are trickier to acquire.
  • The Legend of Zelda: Tends to do this for their goddess related objects.
  • Neverwinter Nights has gemstones which all follow the stock-standard colors mentioned in the description.
  • Minecraft: Emeralds are a conventional green, diamonds are light blue, and quartz is white. Lapis lazuli is so blue that it's used as blue dye.
  • In Last Train to Blue Moon Canyon, the gemstones Nancy must find to operate a device not only look exactly as this trope predicts, but exactly like the pictures of their type in a book Nancy acquires.
  • Pok้mon: The original Generation I games were Red, Green, and Blue. For Generation III, which was essentially a continuity reboot (couldn't link back to Gen I/II games, and included updated Retcon remakes of Gen I,) started with Ruby, Sapphire, and Emerald.
    • Gen IV's Diamond Version was a pale blue.
  • One dungeon in Shining The Holy Ark has the player collecting different coloured gem stones to use in a Solve the Soup Cans puzzle. The only way to figure out what gem went where was were was if you knew what the stock colours of the gems where.
  • Sonic the Hedgehog: Both played straight and averted. The Master Emerald which stands alone, is green. The Chaos Emeralds are a set of seven, only one is green and the others are differentiated by color. Given the Real Life example below they should probably be called Chaos Beryl instead.
  • Final Fantasy IX has the twelve birthstone jewels as equipped accessories, with their menu icons appropriately colored. Dissidia: Final Fantasy includes the same items as trade accessories, minus the Garnet and Amethyst.
  • Paper Mario: The Thousand-Year Door: The seven Crystal Stars that must be collected throughout this game are colored this way. The Diamond, Emerald, Ruby, Sapphire and Garnet stars are white, green, red, blue and orange, respectively. The third Crystal Star, which is yellow, is not a named after a gemstone at all; rather than being named after a yellow gem like topaz, it's simply called the Gold Star despite not being metal. The final Crystal Star is a iridescent white color that's even shinier than the Diamond Star, but it's merely called the Crystal Star rather than being named after any crystal in particular.
  • In Diablo II, you could find the six gems that are explained in their description, each with the colour that it's said in the description. What's more, adding them to Socketed Equipment gives it a glow of the colour of the gem, and some of them (to be precise, ruby, sapphire, topaz and emerald) are associated with elements, adding damage of that element in weapons and resistance to the element in shields (ruby is fire, sapphire is cold, topaz is lightning and emerald is poison). The other two (diamond and amethyst) aren't, though.
  • In Runescape, there are blue sapphires, red rubies, green emeralds, white diamonds, and black onyx. But there are also quest-related gems that are different in color (blood diamond is red, smoke diamond is gray, shadow diamond is black, ice diamond is light gray). Lastly, jade, opal and diamond are in ridiculously similar color. You can have a reference here.
  • Nethack plays this one dead straight, with a few exceptions - there's two possibilities each for turquoise and aquamarine (green or blue), and fluorite is randomly assigned either green, blue, white or violet. All gems are just "< colour > gem" until identified, so an unidentified "red gem" can't turn out to be sapphire, which is a blue gem.
  • Partly averted in Dwarf Fortress, which has diamonds of five colours as well as clear, and also blue, clear and pink garnets in addition to red, and so on and so forth. It assigns the standard colors to emerald, ruby, sapphire, amethyst, topaz and quite a few others, though.
  • In My Sims, the six Interests - Fun, Tasty, Geeky, Cute, Studious, and Spooky - each have a related gem-themed Essence. There’s yellow Topaz for Fun, orange Amber for Tasty, blue Sapphire for Geeky, pink Garnet (a notably rare color for this particular gem) for Cute, green Jade for Studious, and purple Amethyst for Spooky.
  • The Rune Factory series has purple amethysts, red rubies, green emeralds, and white diamonds. However, it also has deep blue aquamarines, so the sapphires end up being pink instead of the usual blue.
  • Ginormo Sword has gems as enemy drops which are used to apply elemental power to your weapons and armor:
  • In Mother Load, when you're digging underground emeralds are green, rubies are red and diamonds are white, which helps you decide which ones you should collect.
  • The Web Game Tower Core features a puzzle involving eight colored gemstones. Each gem has a specific name, with citrine for yellow and obsidian for black.

     Web Comics 
  • The 8 Disaster Stones in Cucumber Quest have each a color, symbol and element.

     Western Animation 

     Real Life 
  • Birthstones are most popular/valuable/expensive in specific colors, and are the Trope Codifier
    • January Birthstone – Garnet - Deep Red
    • February Birthstone – Amethyst - Purple
    • March Birthstone – Aquamarine - Light Blue
    • April Birthstone – Diamond - White or Clear
    • May Birthstone – Emerald - Green
    • June Birthstone – Pearl - White or Cream
    • July Birthstone – Ruby - Red
    • August Birthstone – Peridot - Yellow-Green
    • September Birthstone – Sapphire - Blue
    • October Birthstone – Opal - White or Pink
    • November Birtstone – Topaz - Orange
    • December Birthstone – Turquoise - Blue-Green
  • The range of colors for some minerals is limited and the trope usually reflects that. For example
    • Rubies and sapphires are actually the same material (corundum). The only difference is that rubies are the red kind, and sapphires are other colors (including but not exclusively the blue kind). The only other color besides red that gets a specific name are orangish ones calls padparadscha.
    • Similarly emeralds are specifically the green variety of beryl. Each other color of Beryl has it's own name, blue-green is aquamarine, dark blue is maxixe, yellow is heliodor, pink is morganite, colorless is goshenite, and the extremely rare and valuable red is called Bixbite. If it's faintly green but not enough to be an emerald it's simply called beryl.
    • Amethyst and citrine are both quartz with iron impurities; in citrine the iron is triply ionized (Fe 3+), while in amethyst it's quadruply ionized (Fe 4+).
  • Tourmaline carries it's Aversion Up to Eleven. Not only does it come in just about every imaginable color, a tourmaline crystal is fairly likely to have several colors in different spots in the same crystal. One of the most valuable types, Watermelon Tourmaline, literally starts red, shades into colorless, then turns green just like a watermelon.
  • Aveted however by Real Life Diamonds. With perfect structure and no impurities they are totally transparent and colorless. However with impurities they can be in all kinds of colors, including red, orange, yellow, green, cyan, blue, indigo, violet, magneta. What's more, even gray and black diamond existsnote , leaving the only missing color white.
    • While theoretically possible, nobody has ever found a true violet diamond. The same impurity that grants violet color also causes gray, and so all known violets are very grayed out and muted.

Body to JewelBejeweled TropesCrystal Prison
Color-Coded PatricianAmazing Technicolor IndexColour Coded Timestop
Color-Coded Secret IdentityColour-Coded for Your ConvenienceColour Coded Time Stop

alternative title(s): Colour Coded Stones
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