40d:Gem

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This article is about an older version of DF.

Small clusters of rough gems can be found strewn throughout the mountain. Cut gems can be used to encrust furniture, crafts, weapons, armor and ammunition, to create windows. In addition, raw rock crystals are required to make crystal glass goods. Rough gems, cut gems and their crystal expressions can be used in the creation of legendary artifacts.

Exactly 5% of all rough gems will be cut into a single craft or large gem (with 1 craft for every 2 large gems), and the same occurs with raw glass (but with different ratios - 33% of all jobs, producing only large gems due to a bug; the intended result was 25 crafts for every 2 large gems, the same as in version 0.23.130.23a). These will replace a cut gem and cannot be used to encrust goods. The value of such crafts can easily reach hundreds, possibly even thousands for rare gems.

If there is sand on your map, you can also manufacture raw glass, which is the same as a lower-value, uncut gem.

Contents

[edit] Frequency

At first glance, one might think that any and all gems found in "all stone" have a good chance to be found on/in your map, since stone is stone and your map has plenty of it. However, it appears that there is more going on than a purely random distribution, and that, on any map, a given biome will have one or a very few preferred or predominate type(s) of gem(s) found within it, chosen (at random?) from among all those possible and excluding (most) all others.

So, if you find "pineapple opal" on your map, you may find a lot of it, again and again, and no other opals and few other "all stone" gems. The same pattern often appears with gems with more specific environments - altho' any of them might be found, it tends to be only one or two that dominate, even unto exclusion of all other types at times. This needs more research, but don't be surprised when this pattern starts to look familiar.

[edit] Value

Gems have base value of 3 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 5. Items can be decorated (encrusted) with cut gems; all such decorations have a value of 10 times the gem type's value multiplier. See Gem cutting and Gem setting. Large gems have a base value of 10.

[edit] Varieties

Gems come in many varieties, with their own color and value multipliers:

Rarity Gem name Value (×) Color Found where Found how
Synthetic green glass 2 ☼♦2:0 glass furnace manufactured
Synthetic clear glass 5 ☼♦3:0 glass furnace manufactured
Synthetic crystal glass 10 ☼♦7:1 glass furnace manufactured
Ornamental amber opal 10 6:0 All stone Small clusters
Ornamental aventurine 3 2:0 Sedimentary Small clusters
Ornamental banded agate 2 4:0 Sedimentary Small clusters
Ornamental bloodstone 2 4:0 Sedimentary Small clusters
Ornamental blue jade 2 1:1 Alluvial Small clusters
Ornamental bone opal 10 7:0 All stone Small clusters
Ornamental brown jasper 2 6:0 Sedimentary Small clusters
Ornamental carnelian 2 4:0 Sedimentary Small clusters
Ornamental cherry opal 10 4:1 All stone Small clusters
Ornamental chrysocolla 2 3:1 Malachite Small clusters
Ornamental chrysoprase 2 2:1 Sedimentary Small clusters
Ornamental citrine 2 6:1 All stone Small clusters
Ornamental clear tourmaline 10 7:0 Metamorphic, Sedimentary, Granite Small clusters
Ornamental dendritic agate 2 7:0 Sedimentary Small clusters
Ornamental fire agate 2 6:0 Sedimentary Small clusters
Ornamental fortification agate 2 7:1 Sedimentary Small clusters
Ornamental gold opal 10 6:1 All stone Small clusters
Ornamental gray chalcedony 2 7:0 Sedimentary Small clusters
Ornamental jasper opal 10 7:1 All stone Small clusters
Ornamental lace agate 2 1:1 Sedimentary Small clusters
Ornamental lapis lazuli 2 1:1 Igneous intrusive, Marble Small clusters
Ornamental lavender jade 2 5:0 Alluvial Small clusters
Ornamental milk opal 10 7:1 All stone Small clusters
Ornamental milk quartz 2 7:1 All stone Small clusters
Ornamental moonstone 2 7:1 Metamorphic Small clusters
Ornamental morion 2 0:1 All stone Small clusters
Ornamental moss agate 2 2:0 Sedimentary Small clusters
Ornamental moss opal 10 2:0 All stone Small clusters
Ornamental onyx opal 10 7:1 All stone Small clusters
Ornamental onyx 2 0:1 Sedimentary Small clusters
Ornamental picture jasper 3 6:0 Sedimentary Small clusters
Ornamental pineapple opal 10 7:1 All stone Small clusters
Ornamental pink jade 2 5:1 Alluvial Small clusters
Ornamental pipe opal 10 7:1 All stone Small clusters
Ornamental plume agate 2 6:0 Sedimentary Small clusters
Ornamental prase opal 10 2:0 All stone Small clusters
Ornamental prase 2 2:0 All stone Small clusters
Ornamental pyrite 2 6:1 All stone Small clusters
Ornamental resin opal 10 6:1 All stone Small clusters
Ornamental rock crystal 2 7:1 All stone Small clusters
Ornamental rose quartz 3 4:1 All stone Small clusters
Ornamental sardonyx 2 4:0 Sedimentary Small clusters
Ornamental sard 2 4:0 Sedimentary Small clusters
Ornamental schorl 2 0:1 Metamorphic, Sedimentary, Granite Small clusters
Ornamental shell opal 10 7:0 All stone Small clusters
Ornamental smoky quartz 2 6:0 All stone Small clusters
Ornamental sunstone 2 6:1 Basalt, Gneiss Small clusters
Ornamental tiger iron 2 6:1 Sedimentary Small clusters
Ornamental tigereye 2 6:1 Sedimentary Small clusters
Ornamental tube agate 2 6:0 Sedimentary Small clusters
Ornamental turquoise 2 3:1 Igneous extrusive, Kaolinite, Granite Small clusters
Ornamental variscite 2 2:0 Bauxite Small clusters
Ornamental wax opal 10 6:0 All stone Small clusters
Ornamental white chalcedony 2 7:1 Sedimentary Small clusters
Ornamental white jade 2 7:1 Alluvial Small clusters
Ornamental wood opal 10 6:0 All stone Small clusters
Ornamental yellow jasper 2 6:1 Sedimentary Small clusters
Semi-Precious alexandrite 20 5:1 Granite, Schist, Marble Small clusters
Semi-Precious almandine 20 4:0 Metamorphic, Diorite, Gabbro Small clusters
Semi-Precious amethyst 20 5:1 All stone Small clusters
Semi-Precious aquamarine 20 3:1 Granite, Schist, Marble Small clusters
Semi-Precious bandfire opal 20 7:1 All stone Small clusters
Semi-Precious black opal 30 0:1 All stone Small clusters
Semi-Precious black pyrope 20 0:1 Metamorphic, Kimberlite Small clusters
Semi-Precious black zircon 20 0:1 All igneous, Metamorphic Small clusters
Semi-Precious blue garnet 30 1:0 Metamorphic, Granite Small clusters
Semi-Precious brown zircon 20 6:0 All igneous, Metamorphic Small clusters
Semi-Precious cat's eye 20 7:1 Granite, Schist, Marble Small clusters
Semi-Precious chrysoberyl 20 2:1 Granite, Schist, Marble Small clusters
Semi-Precious cinnamon grossular 20 6:0 Marble Small clusters
Semi-Precious claro opal 20 1:1 All stone Small clusters
Semi-Precious clear garnet 20 7:0 Metamorphic, Granite Small clusters
Semi-Precious clear zircon 25 7:1 All igneous, Metamorphic Small clusters
Semi-Precious crystal opal 20 7:1 All stone Small clusters
Semi-Precious demantoid 30 2:0 Chromite Small clusters
Semi-Precious fire opal 15 4:1 All stone Small clusters
Semi-Precious golden beryl 20 6:1 Granite, Schist, Marble Small clusters
Semi-Precious goshenite 20 7:1 Granite, Schist, Marble Small clusters
Semi-Precious green jade 20 2:1 Alluvial Small clusters
Semi-Precious green tourmaline 20 2:0 Metamorphic, Sedimentary, Granite Small clusters
Semi-Precious green zircon 20 2:0 All igneous, Metamorphic Small clusters
Semi-Precious harlequin opal 20 7:1 All stone Small clusters
Semi-Precious heliodor 20 2:1 Granite, Schist, Marble Small clusters
Semi-Precious honey yellow beryl 20 6:0 Granite, Schist, Marble Small clusters
Semi-Precious indigo tourmaline 25 1:0 Metamorphic, Sedimentary, Granite Small clusters
Semi-Precious jelly opal 15 6:0 All stone Small clusters
Semi-Precious kunzite 20 5:1 Granite Small clusters
Semi-Precious levin opal 20 6:1 All stone Small clusters
Semi-Precious light yellow diamond 30 7:1 Kimberlite Small clusters
Semi-Precious melanite 15 0:1 Marble Small clusters
Semi-Precious morganite 20 5:1 Granite, Schist, Marble Small clusters
Semi-Precious peridot 20 2:1 Gabbro Small clusters
Semi-Precious pinfire opal 20 7:1 All stone Small clusters
Semi-Precious pink garnet 20 5:1 Metamorphic, Granite Small clusters
Semi-Precious pink tourmaline 15 4:1 Metamorphic, Sedimentary, Granite Small clusters
Semi-Precious precious fire opal 20 4:1 All stone Small clusters
Semi-Precious purple spinel 20 5:0 Metamorphic, Diorite, Gabbro Small clusters
Semi-Precious red beryl 20 4:1 Granite, Schist, Marble Small clusters
Semi-Precious red flash opal 20 4:1 All stone Small clusters
Semi-Precious red grossular 20 4:0 Marble Small clusters
Semi-Precious red pyrope 20 4:0 Metamorphic, Kimberlite Small clusters
Semi-Precious red spinel 20 4:0 Metamorphic, Diorite, Gabbro Small clusters
Semi-Precious red tourmaline 15 4:0 Metamorphic, Sedimentary, Granite Small clusters
Semi-Precious red zircon 20 4:0 All igneous, Metamorphic Small clusters
Semi-Precious rhodolite 20 5:0 Metamorphic, Kimberlite Small clusters
Semi-Precious rubicelle 20 6:1 Metamorphic, Diorite, Gabbro Small clusters
Semi-Precious tanzanite 20 5:1 Gabbro Small clusters
Semi-Precious topazolite 20 6:1 Marble Small clusters
Semi-Precious topaz 20 6:1 Granite Small clusters
Semi-Precious tsavorite 30 2:0 Marble Small clusters
Semi-Precious violet spessartine 20 5:1 Metamorphic, Granite Small clusters
Semi-Precious white opal 20 7:1 All stone Small clusters
Semi-Precious yellow grossular 20 6:1 Marble Small clusters
Semi-Precious yellow spessartine 20 6:1 Metamorphic, Granite Small clusters
Semi-Precious yellow zircon 20 6:1 All igneous, Metamorphic Small clusters
Precious emerald 40 2:0 Granite, Schist, Marble Small clusters
Precious faint yellow diamond 40 6:0 Kimberlite Small clusters
Precious ruby 40 4:0 Bauxite Small clusters
Precious sapphire 40 1:0 Bauxite Small clusters
Rare black diamond 60 0:1 Faint yellow diamond Single gem
Rare blue diamond 60 1:0 Faint yellow diamond Single gem
Rare clear diamond 60 7:1 Faint yellow diamond Single gem
Rare green diamond 60 2:0 Faint yellow diamond Single gem
Rare red diamond 60 4:0 Faint yellow diamond Single gem
Rare star ruby 60 4:1 Ruby Single gem
Rare star sapphire 60 1:1 Sapphire Single gem
Rare yellow diamond 60 6:1 Faint yellow diamond Single gem

Unlike other gems, diamonds can ignite if they come into contact with magma.

[edit] Rare Gems

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. Star sapphires and rubies only occur within clusters of their peers.

[edit] Glass

Raw glass is treated as an uncut gem. There are three subtypes of raw glass (and, once cut, of cut glass gems):

Gem name Value Color Requires
green glass ☼♦ bag full of sand
clear glass ☼♦ 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.

Raw gems are only one of the many things your glassmakers can make from glass. See glass and glass industry for more information.

Due to a bug, it is not possible to cut raw clear glass at a Jeweler's workshop without issuing a work order via your manager.

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