v0.31:Gem industry

xTATTEREDx  · +FINE+  · *SUPERIOR*  · ≡EXCEPTIONAL≡  · ☼MASTERWORK☼

v50.14 · v0.47 · v0.34 · v0.31.25 · v0.28 · v0.23 This article is about an older version of DF. More Info · V

The gem industry deals with the processing of gems. Like other industries, creates raw materials, finished goods, and can be used to enhance finished goods with decorations. Because of the skills and materials involved, the gem industry is very closely tied to the glass industry.

Jeweler's Workshop

The jeweler's workshop is the heart of the gem industry. Rough gems are taken to the the jeweler's workshop, where dwarves use the Gem cutter skill to turn the rough gems into cut gems or large gems. At the same workshop, a dwarf uses the Gem setter skill to take the cut gems and use them to encrust a wide variety of items.

Obtaining Gems

The easiest way to obtain rough gems is through mining. Highly skilled miners are more likely to leave a rough gem behind when they mine through a tile, and it may be advisable to designate certain gem clusters as burrows restricted to your most skilled miners in hopes of maximizing your yield.

The glass industry is also a ready source of raw glass, which is treated in all ways as a rough gem. While glass has a relatively low value compared to other gems, with a magma glass furnace and sand it is possible to produce raw glass in bulk, instead of mining for gems. Raw glass is also a valuable way to give dwarves experience in Gem Cutting and Gem Setting, or at least preventing those skills from becoming Rusty.

Finally, all manner of gems are generally available through trade with dwarf and human caravans, including rough gems, cut gems, large gems, gem crafts, and various glass products.

Gem Cutting

Gem cutting is a job at the jeweler's workshop; you can choose which type of gem to cut based on what rough gems you have available. Cutting consumes a rough gem and may produce a cut gem, large gem, or gem craft. By far the most common result is a cut gem, which may be encrusted (see Gem Setting, below). Large gems and gem crafts are finished goods and occur much more seldom; gem crafts are rarer than large gems. The gem cutter's skill level does not appear to affect the chances of producing a large gem or gem crafts, since gems have no quality levels, but it is possible that levels past Legendary might affect the process^[Verify]. Experimental results suggest that the odds of getting a large gem are 1 in 7, and the odds of gem crafts are 1 in 15^[Verify].

Cut gems have a base value of 5, which is multiplied by the value of the gem (2-60). A cut gem is thus worth 10-300☼.

Large Gems

Large gems are considered finished goods and cannot be used for any other purpose besides trading. Like most other finished goods, large gems have quality levels, dependent on the skill level in Gem Cutting^[Verify]. Large gems have a base value of 10, which is multiplied by the value of the gem (2-60) and the quality level (1-12). A large gem of base quality is thus worth 20-7,200☼.

Gem Crafts

Gem crafts are crafts made out of a type of gem, and include figurines, rings, earrings, amulets, bracelets, scepters, and crowns. Like other crafts (and the above mentioned large gems), gem crafts have quality levels, dependent on the skill level in Gem Cutting^[Verify]. Glass cannot be made directly into crafts at a glass furnace, only through a jeweler's workshop. Crafts have a base value of 10, which is multiplied by the value of the gem (2-60) and the quality level (1-12). A gem craft is thus worth 20-7,200☼.

Perfect Gems

Perfect gems are artifacts created by dwarves seized by a strange mood. They have a base value of 10, which is multiplied by the value of the gem (2-60) and the quality level (120); a perfect gem will always receive one free decoration, which effectively doubles the value. A perfect gem is thus worth 4,800-144,000☼, plus the value of any additional decorations. Perfect gems cannot be created on purpose, but keeping a stockpile of high-value gems adjacent to the jeweler's workshop might increase the chance of a moody dwarf choosing one of them. Forbidding low-value gems is also an option.

Gem Setting

Gem setting is a job at the jeweler's workshop, and takes a cut gem to encrust furniture, ammo, and finished goods. You can specify the type of object the dwarf will encrust, but not the specific object. To encrust a specific piece of equipment with a specific gem requires careful use of stockpiles, and probably locking the jeweler in a burrow to avoid them going to different stockpiles.

Gem decorations have quality levels determined by the Gem Setter's skill level. Decorations have a base value of 10, which is multiplied by the value of the gem (2-60) and the quality level (1-12). A gem decoration is thus worth 20-7,200☼. A given item may possess multiple decorations (but only one using each type of gem^[Verify]), and encrusting items with gems can increase the wealth of a fortress substantially.

Glass

The glass industry produces raw glass, which is treated as a rough gem for all purposes. Cutting a raw glass gem usually yields a cut glass gem of the same type, and may yield a large cut glass gem or cut glass crafts. Perfect cut glass gems are also possibly, but very rare due to the circumstances required for their creation. Cut glass gems may be set by a Gem setter, just like any other cut gem.

Glass crafts et al. made by gem cutting instead of normal glassmaking do not satisfy mandates for glass crafts or objects, but will satisfy mandates for large gems or gem crafts. Cut glass gems may also be used to construct a gem window, although this is less valuable than making a window directly from glass at a glass furnace.

Gem cutters receive the same experience cutting raw glass as other, more valuable gems; so it is typical for beginning jewelers to "train" by cutting raw green glass gems until they reach Legendary skill level. This requires a good source of sand and fuel or magma for the glass furnace, and provides a surplus of cut glass gems which may be used to encrust trade goods and the like.

Gem Windows

Windows can be made out of any sort of glass at a glass furnace (in which case they are a type of furniture), or may be crafted out of any three cut gems (including cut glass gems), popularly known as a "gem window." If constructed of gems of a different color, a gem window will flash between the colors of the individual gems that make it up. Disassembling a "gem window" yields the gems that made it up.

Gem windows have no quality levels, so the value of a gem window is equal to the sum of the gems that made it up (2-60 per gem), for a total value of 6-180☼. By comparison, a glass window has a value modifier of 25, quality levels, and a material multiplier (2-10). In general, glass windows have a greater value.

Industry Management

The trick to making the most of your gems is care and attention to detail. Keep an eye out for stone types that contains valuable gems (like kimberlite, the source of all diamonds). Designate rare or valuable clusters of gems as burrows for your high-skill miners to maximize your yield.

Create separate custom stockpiles for your high-value and low-value gems adjacent to one or two jeweler's workshops. Designate the jeweler's workshop/high-value stockpile as a burrow specific your highest-level jeweler(s), and the jeweler's workshop/low-value stockpile as a burrow specific to your jewelers-in-training. For extra safety, use (q-P) to set the high-value jeweler's workshop profile so only your highest-skilled jewelers can use it.

Raw glass and low-value ornamental gems are ideal for training Gem Cutting and Encrusting skills, particularly if your glass industry is in full swing.

When encrusting items, dwarves will generally go for the nearest piece of furniture/ammo/finished good that is not nailed down. To ensure that the gem setter encrusts the right item with the right gem(s), designate a small stockpile for that item as close to the jeweler's workshop as possible, as part of the burrow. And, if necessary, lock the doors until the jeweler encrusts the item.

Industry Overview

		raw glass counts as rough gems	☼ ☼ ☼ ☼ ☼ ☼ ☼ ☼ Raw Glass
☼ ☼ ☼ ☼ Gem Clusters	Mining	☼ ☼ ☼ ☼ Rough Gems	rough rock crystals	Glass industry
		* ░ * [ ░ { ░ Gem cutting	sometimes created
▒ ▒ ▒ ▒ Gem Windows			♦ ♦ ♦ ♦ Large Gems	o ♀ o ° Å ¶ ♀ δ Gem Crafts
Furnit. Hauling	3 gems are needed	♦ ♦ ♦ ♦ Cut Gems
Goods industry				Goods industry
	o ¶ Å ♀ ♀ ♀ δ æ Finished Goods	* ░ * [ ░ { ░ Gem setting	o ¶ Å ♀ ♀ ♀ δ æ Encrusted Goods
Furniture industry				Furniture industry
	╤ Ω Ω Ω π π Ω ╤ Furniture	* ░ * [ ░ { ░ Gem setting	╤ Ω Ω Ω π π Ω ╤ Encrusted Furniture
Arms industry				Arms industry
	/ / / / / / / / Ammo	* ░ * [ ░ { ░ Gem setting	/ / / / / / / / Encrusted Ammo