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v50.08 · v0.47.05This article is about the current version of DF.
Note that some content may still need to be updated.
Small clusters of rough gems can be found almost anywhere while mining. After they have been mined by a miner and cut by a gem cutter, a gem setter can use them to encrust furniture, crafts, and ammunition. In addition, raw rock crystals are required to make crystal glass goods. Cut gems can also be used to create windows and are often required as a source material for legendary artifacts. Gem-encrusted weapons and armor can be found in-game, but cannot be made in fortress mode. Stones, except the various types of clay, can also be cut into gems.
There are a total of 130 different kinds of gems, 127 excluding the three kinds of glass. Of these, 57 are ornamental, 58 semi-precious, 4 precious and 8 rare.
A large variety of cut gems can be brought by and requested from the dwarven caravan. You cannot import rough gems with the exception of raw glass, which human and dwarven caravans can bring.
Exactly 5% of all rough gems will be cut into a single craft or large gem (with 1 craft for every 8 large gems), and the same occurs with raw glass (but with different ratios - 33% of all jobs, producing 11 crafts for every 16 large gems). Note that these will replace a cut gem and cannot be used to encrust goods. The value of such crafts can easily reach hundreds, even several thousand in the case of valuable gems and good craftsdwarfship. A dwarf in the throes of a strange mood can take a single gem and cut it into a legendary artifact known as a "perfect gem" - this is simply a special name for an artifact large gem.
Large gem production is bugged as of v50.07, and large gems can only be produced when specifying a gem type.
If you have any bags of sand, you can also manufacture raw glass, which is the same as a lower-value, uncut gem.
Gizzard stones are found as a by-product when butchering some animals, and can be used like cut gems. Only a few animal species give gizzard stones, but each member of such a species butchered will yield one, which can lead to a decent supply when you manage to set up an ostrich or elk bird farm.
A killed amethyst man will, logically, drop a rough amethyst, but amethyst men are fairly rare. Forgotten beasts made of gem will leave a corpse, in some cases weighing thousands of Urists, but the corpse cannot be cut into gems or used in any other way.
You can also direct your dwarves to cut stone, shell, horn and ivory into a large gem which can be done at a craftsdwarf's workshop.
Gems have a base value of 6 in rough form, which is multiplied by the appropriate value modifier from the table below. They gain value after they are cut in a jeweler's workshop. Cut gems have a base value of 20. Items can be decorated (encrusted) with cut gems; all such decorations have a value of 20 times the gem type's value multiplier - see gem cutting and gem setting. Large gems have a base value of 10, and can also have a quality modifier which increases value.
To give an example, a rough green zircon will be worth (6×20=) 120☼, a cut green zircon (20×20=) 400☼ and a masterwork large green zircon (10×20×2+30=) 430☼.
Dwarves who have preferences for certain gems and colors will have a higher value perception of the items and walls encrusted with them.
In the premium version of the game, you can also quickly identify low-value uncut gems from the higher-value counterparts by the way they appear in-game - lower-value gems are smaller and do not have as many spikes.
Gems come in many varieties, with their own color and value multipliers:
|Rarity||Gem name||Value (×)||Color||Graphic||Found where||Found how|
|Synthetic||green glass||2||☼♦ dark green||Glass furnace||Manufactured|
|Synthetic||clear glass||5||☼♦ clear||Glass furnace||Manufactured|
|Synthetic||crystal glass||10||☼♦ clear||Glass furnace||Manufactured|
|Ornamental||amber opal||10||☼♦ amber||All stone||Small clusters|
|Ornamental||aventurine||3||☼♦ mint green||Sedimentary||Small clusters|
|Ornamental||banded agate||2||☼♦ maroon||Sedimentary||Small clusters|
|Ornamental||bloodstone||2||☼♦ sea green||Sedimentary||Small clusters|
|Ornamental||blue jade||2||☼♦ blue||Alluvial||Small clusters|
|Ornamental||bone opal||10||☼♦ beige||All stone||Small clusters|
|Ornamental||brown jasper||2||☼♦ brown||Sedimentary||Small clusters|
|Ornamental||carnelian||2||☼♦ rust||Sedimentary||Small clusters|
|Ornamental||cherry opal||10||☼♦ chestnut||All stone||Small clusters|
|Ornamental||chrysocolla||2||☼♦ turquoise||Malachite||Small clusters|
|Ornamental||chrysoprase||2||☼♦ jade||Sedimentary||Small clusters|
|Ornamental||citrine||2||☼♦ cream||All stone||Small clusters|
|Ornamental||clear tourmaline||10||☼♦ clear||Metamorphic, Sedimentary, Granite||Small clusters|
|Ornamental||dendritic agate||2||☼♦ ivory||Sedimentary||Small clusters|
|Ornamental||fire agate||2||☼♦ lemon||Sedimentary||Small clusters|
|Ornamental||fortification agate||2||☼♦ cardinal||Sedimentary||Small clusters|
|Ornamental||gold opal||10||☼♦ golden yellow||All stone||Small clusters|
|Ornamental||gray chalcedony||2||☼♦ gray||Sedimentary||Small clusters|
|Ornamental||jasper opal||10||☼♦ maroon||All stone||Small clusters|
|Ornamental||lace agate||2||☼♦ light blue||Sedimentary||Small clusters|
|Ornamental||lapis lazuli||2||☼♦ azure||Igneous intrusive, Marble||Small clusters|
|Ornamental||lavender jade||2||☼♦ heliotrope||Alluvial||Small clusters|
|Ornamental||milk opal||10||☼♦ cream||All stone||Small clusters|
|Ornamental||milk quartz||2||☼♦ cream||All stone||Small clusters|
|Ornamental||moonstone||2||☼♦ ivory||Metamorphic||Small clusters|
|Ornamental||morion||2||☼♦ black||All stone||Small clusters|
|Ornamental||moss agate||2||☼♦ white||Sedimentary||Small clusters|
|Ornamental||moss opal||10||☼♦ moss green||All stone||Small clusters|
|Ornamental||onyx opal||10||☼♦ ivory||All stone||Small clusters|
|Ornamental||onyx||2||☼♦ black||Sedimentary||Small clusters|
|Ornamental||picture jasper||3||☼♦ golden yellow||Sedimentary||Small clusters|
|Ornamental||pineapple opal||10||☼♦ beige||All stone||Small clusters|
|Ornamental||pink jade||2||☼♦ pink||Alluvial||Small clusters|
|Ornamental||pipe opal||10||☼♦ ivory||All stone||Small clusters|
|Ornamental||plume agate||2||☼♦ cream||Sedimentary||Small clusters|
|Ornamental||prase opal||10||☼♦ mint green||All stone||Small clusters|
|Ornamental||prase||2||☼♦ spring green||All stone||Small clusters|
|Ornamental||pyrite||2||☼♦ silver||All stone||Small clusters|
|Ornamental||resin opal||10||☼♦ yellow||All stone||Small clusters|
|Ornamental||rock crystal||2||☼♦ clear||All stone||Small clusters|
|Ornamental||rose quartz||3||☼♦ pink||All stone||Small clusters|
|Ornamental||sardonyx||2||☼♦ scarlet||Sedimentary||Small clusters|
|Ornamental||sard||2||☼♦ mahogany||Sedimentary||Small clusters|
|Ornamental||schorl||2||☼♦ taupe dark||Metamorphic, Sedimentary, Granite||Small clusters|
|Ornamental||shell opal||10||☼♦ ivory||All stone||Small clusters|
|Ornamental||smoky quartz||2||☼♦ olive||All stone||Small clusters|
|Ornamental||sunstone||2||☼♦ pumpkin||Basalt, Gneiss||Small clusters|
|Ornamental||tiger iron||2||☼♦ golden yellow||Sedimentary||Small clusters|
|Ornamental||tigereye||2||☼♦ lemon||Sedimentary||Small clusters|
|Ornamental||tube agate||2||☼♦ amber||Sedimentary||Small clusters|
|Ornamental||turquoise||2||☼♦ turquoise||Igneous extrusive, Kaolinite, Granite||Small clusters|
|Ornamental||variscite||2||☼♦ jade||Bauxite||Small clusters|
|Ornamental||wax opal||10||☼♦ flax||All stone||Small clusters|
|Ornamental||white chalcedony||2||☼♦ white||Sedimentary||Small clusters|
|Ornamental||white jade||2||☼♦ white||Alluvial||Small clusters|
|Ornamental||wood opal||10||☼♦ dark brown||All stone||Small clusters|
|Ornamental||yellow jasper||2||☼♦ yellow||Sedimentary||Small clusters|
|Semi-Precious||alexandrite||20||☼♦ violet||Granite, Schist, Marble||Small clusters|
|Semi-Precious||almandine||20||☼♦ maroon||Metamorphic, Diorite, Gabbro||Small clusters|
|Semi-Precious||amethyst||20||☼♦ amethyst||All stone||Small clusters|
|Semi-Precious||aquamarine||20||☼♦ aquamarine||Granite, Schist, Marble||Small clusters|
|Semi-Precious||bandfire opal||20||☼♦ pearl||All stone||Small clusters|
|Semi-Precious||black opal||30||☼♦ black||All stone||Small clusters|
|Semi-Precious||black pyrope||20||☼♦ black||Metamorphic, Kimberlite||Small clusters|
|Semi-Precious||black zircon||20||☼♦ black||All igneous, Metamorphic||Small clusters|
|Semi-Precious||blue garnet||30||☼♦ blue||Metamorphic, Granite||Small clusters|
|Semi-Precious||brown zircon||20||☼♦ light brown||All igneous, Metamorphic||Small clusters|
|Semi-Precious||cat's eye||20||☼♦ cream||Granite, Schist, Marble||Small clusters|
|Semi-Precious||chrysoberyl||20||☼♦ chartreuse||Granite, Schist, Marble||Small clusters|
|Semi-Precious||cinnamon grossular||20||☼♦ cinnamon||Marble||Small clusters|
|Semi-Precious||claro opal||20||☼♦ light blue||All stone||Small clusters|
|Semi-Precious||clear garnet||20||☼♦ clear||Metamorphic, Granite||Small clusters|
|Semi-Precious||clear zircon||25||☼♦ clear||All igneous, Metamorphic||Small clusters|
|Semi-Precious||crystal opal||20||☼♦ clear||All stone||Small clusters|
|Semi-Precious||demantoid||30||☼♦ green-yellow||Chromite||Small clusters|
|Semi-Precious||fire opal||15||☼♦ scarlet||All stone||Small clusters|
|Semi-Precious||golden beryl||20||☼♦ golden yellow||Granite, Schist, Marble||Small clusters|
|Semi-Precious||goshenite||20||☼♦ clear||Granite, Schist, Marble||Small clusters|
|Semi-Precious||green jade||20||☼♦ jade||Alluvial||Small clusters|
|Semi-Precious||green tourmaline||20||☼♦ green||Metamorphic, Sedimentary, Granite||Small clusters|
|Semi-Precious||green zircon||20||☼♦ green||All igneous, Metamorphic||Small clusters|
|Semi-Precious||harlequin opal||20||☼♦ ivory||All stone||Small clusters|
|Semi-Precious||heliodor||20||☼♦ green-yellow||Granite, Schist, Marble||Small clusters|
|Semi-Precious||honey yellow beryl||20||☼♦ saffron||Granite, Schist, Marble||Small clusters|
|Semi-Precious||indigo tourmaline||25||☼♦ indigo||Metamorphic, Sedimentary, Granite||Small clusters|
|Semi-Precious||jelly opal||15||☼♦ clear||All stone||Small clusters|
|Semi-Precious||kunzite||20||☼♦ fuchsia||Granite||Small clusters|
|Semi-Precious||levin opal||20||☼♦ flax||All stone||Small clusters|
|Semi-Precious||light yellow diamond||30||☼♦ cream||Kimberlite||Small clusters|
|Semi-Precious||melanite||15||☼♦ black||Marble||Small clusters|
|Semi-Precious||morganite||20||☼♦ lilac||Granite, Schist, Marble||Small clusters|
|Semi-Precious||peridot||20||☼♦ green-yellow||Gabbro||Small clusters|
|Semi-Precious||pinfire opal||20||☼♦ flax||All stone||Small clusters|
|Semi-Precious||pink garnet||20||☼♦ pink||Metamorphic, Granite||Small clusters|
|Semi-Precious||pink tourmaline||15||☼♦ pink||Metamorphic, Sedimentary, Granite||Small clusters|
|Semi-Precious||precious fire opal||20||☼♦ red||All stone||Small clusters|
|Semi-Precious||purple spinel||20||☼♦ purple||Metamorphic, Diorite, Gabbro||Small clusters|
|Semi-Precious||red beryl||20||☼♦ red||Granite, Schist, Marble||Small clusters|
|Semi-Precious||red flash opal||20||☼♦ red||All stone||Small clusters|
|Semi-Precious||red grossular||20||☼♦ red||Marble||Small clusters|
|Semi-Precious||red pyrope||20||☼♦ red||Metamorphic, Kimberlite||Small clusters|
|Semi-Precious||red spinel||20||☼♦ red||Metamorphic, Diorite, Gabbro||Small clusters|
|Semi-Precious||red tourmaline||15||☼♦ chestnut||Metamorphic, Sedimentary, Granite||Small clusters|
|Semi-Precious||red zircon||20||☼♦ red||All igneous, Metamorphic||Small clusters|
|Semi-Precious||rhodolite||20||☼♦ puce||Metamorphic, Kimberlite||Small clusters|
|Semi-Precious||rubicelle||20||☼♦ red||Metamorphic, Diorite, Gabbro||Small clusters|
|Semi-Precious||tanzanite||20||☼♦ azure||Gabbro||Small clusters|
|Semi-Precious||topazolite||20||☼♦ saffron||Marble||Small clusters|
|Semi-Precious||topaz||20||☼♦ goldenrod||Granite||Small clusters|
|Semi-Precious||tsavorite||30||☼♦ green||Marble||Small clusters|
|Semi-Precious||violet spessartine||20||☼♦ violet||Metamorphic, Granite||Small clusters|
|Semi-Precious||white opal||20||☼♦ white||All stone||Small clusters|
|Semi-Precious||yellow grossular||20||☼♦ yellow||Marble||Small clusters|
|Semi-Precious||yellow spessartine||20||☼♦ yellow||Metamorphic, Granite||Small clusters|
|Semi-Precious||yellow zircon||20||☼♦ yellow||All igneous, Metamorphic||Small clusters|
|Precious||emerald||40||☼♦ emerald||Granite, Schist, Marble||Small clusters|
|Precious||faint yellow diamond||40||☼♦ beige||Kimberlite||Small clusters|
|Precious||ruby||40||☼♦ scarlet||Bauxite||Small clusters|
|Precious||sapphire||40||☼♦ azure||Bauxite||Small clusters|
|Rare||black diamond||60||☼♦ black||Faint yellow diamond||Single gem|
|Rare||blue diamond||60||☼♦ blue||Faint yellow diamond||Single gem|
|Rare||clear diamond||60||☼♦ clear||Faint yellow diamond||Single gem|
|Rare||green diamond||60||☼♦ green||Faint yellow diamond||Single gem|
|Rare||red diamond||60||☼♦ scarlet||Faint yellow diamond||Single gem|
|Rare||star ruby||60||☼♦ red||Ruby||Single gem|
|Rare||star sapphire||60||☼♦ light blue||Sapphire||Single gem|
|Rare||yellow diamond||60||☼♦ yellow||Faint yellow diamond||Single gem|
See here or here for a sortable, print-friendly spreadsheet with all gems and their values.
See here for a text list of rough gems sorted alphabetically by variety.
Unlike other gems, diamonds can ignite if they come into contact with magma.
Finished gems have a particular cut, which doesn't affect the gem's value. A gem can have multiple cuts, such as a "square brilliant" or "tapered baguette" cut. Some gem cuts are also known as "cabochons," which have a basic "shape" cut typically as a rounded, polished stone. Gizzard stones do not have cuts.
List of cuts:
Faint yellow diamonds only appear in kimberlite (which, itself, only appears in gabbro layers) and sapphires and rubies only appear in bauxite (which occurs in any sedimentary layers). Colored diamonds only occur in pre-existing clusters of faint yellow diamonds, and in the gem-encrusted walls on the bottom-most cavern layer. Star sapphires and star rubies only occur within clusters of their peers.
Raw glass is treated as an uncut gem. There are three subtypes of raw glass (and, once cut, of cut glass gems):
|green glass||2×||☼♦||bag full of sand|
|clear glass||5×||☼♦||bag full of sand + pearlash|
|crystal glass||10×||☼♦||rough rock crystal + pearlash|
Making raw glass requires a dwarf with the glassmaking labor designated, and, just like working metal, it also requires fuel (either coke or charcoal) at a normal glass furnace, or magma at a magma glass furnace. Like all gems, raw glass has no quality modifiers. Note that cut rock crystals can't be used to make crystal glass objects.
Raw gems are only one of the many things your glassmakers can make from glass. See glass and glass industry for more information.
In real life
A gem is a mineral (or a mineral-like material) admired by a culture, often due to their beauty and durability (resistance to scratches), so that they have economic value in and of themselves.
Most gems are made of the same basic minerals found in common rocks; but their atoms are arranged into ordered patterns, called crystals, with drastic consequences to their appearance and material properties. For example, the same mineral quartz that looks so unremarkable in quartzite may form the strikingly geometric, beautifully translucent rock crystals, if it has the space to grow up slowly – in a crack or cavity within granite rock, for example.
Each particular crystal has a stable angle between its faces, depending on the underlying atomic structure; quartz is hexagonal, while rock salt is cubic.
A large rock crystal, cut in an emerald-cut shape. Expert gem cutters will work with the natural planes of the crystal's structure, making them shiny and reflective.
Cubic rock salt crystals (click to embiggen).
A more drastic (and famous) example is carbon. The organic content of sedimentary rocks like bituminous coal may be pressured and heated into honeycomb layers, forming the metamorphic stone graphite (which we use in pencils, and dwarves use for long-lasting fires). That very same carbon may be shaped, with more pressure and less heat (when, for example, stricken by a meteorite), into the nested cubes known as diamonds.
Bituminous coal, aka dead swamp stuff. Mostly carbon.
Rough diamonds and graphite, also carbon.
Round brilliant cut diamonds.
Some non-mineral materials that have been sometimes considered "gems" include organic products like amber, coral, and pearl; and rocks (bundles of multiple minerals) like jet, jade and lapis lazuli. Of these, pearl only exists in DF as a placeholder, coral and amber in the most rudimentary of forms; but not as gemstones. Jet counts as a regular stone in DF, while jade (in various colors) and lapis lazuli are gemstones.
|"Gem" in other Languages
|More: Gems • Metals • Stones|
Alcohol • Extract (Golden salve • Gnomeblight • Honey • Royal jelly • Syrup • Venom) • Soap
Metal • Milk of lime • Soil (Clay • Sand) • Stone (Ash glaze • Earthenware • Gem • Gypsum plaster • Porcelain • Quicklime • Stoneware • Tin glaze)
|See also: Material science|