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v0.34 Talk:Gem

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Revision as of 20:19, 11 January 2015 by Afghani84 (talk | contribs) (→‎Change in gem values?: new section)
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Just FYI, dwarves can now polish non-gemstone rocks into cabochons in the jewelers workshop. Even slate!--Auric 18:26, 14 March 2012 (UTC)

Gem cuts

If I'm reading it correctly, raw/objects/entity_default.txt defines what cuts of gem a civ can produce:

  Dwarf Human Goblin Elf / Kobold /
Animal men
STONE_SHAPE:
  • OVAL_CABOCHON
  • ROUND_CABOCHON
  • CUSHION_CABOCHON
  • RECTANGULAR_CABOCHON
  • OVAL_CABOCHON
  • ROUND_CABOCHON
  • CUSHION_CABOCHON
  • RECTANGULAR_CABOCHON
  • RECTANGULAR_CABOCHON
  • OVAL_CABOCHON
GEM_SHAPE:
  • OVAL_CABOCHON
  • ROUND_CABOCHON
  • CUSHION_CABOCHON
  • RECTANGULAR_CABOCHON

  • POINT_CUT_GEM
  • TABLE_CUT_GEM
  • SINGLE_CUT_GEM
  • ROSE_CUT_GEM
  • BRIOLETTE_CUT_GEM
  • EMERALD_CUT_GEM
  • MARQUISE_CUT_GEM
  • OVAL_CUT_GEM
  • PEAR_CUT_GEM
  • SQUARE_BRILLIANT_CUT_GEM
  • RADIANT_CUT_GEM
  • TRILLION_CUT_GEM
  • ROUND_BRILLIANT_CUT_GEM
  • BAGUETTE_CUT_GEM
  • TAPERED_BAGUETTE_CUT_GEM
  • CUSHION_CUT_GEM
  • OCTAGON_CUT_GEM
  • SQUARE_CUT_GEM
  • OVAL_CABOCHON
  • ROUND_CABOCHON
  • CUSHION_CABOCHON
  • RECTANGULAR_CABOCHON

  • POINT_CUT_GEM
  • TABLE_CUT_GEM
  • SINGLE_CUT_GEM
  • ROSE_CUT_GEM
  • BRIOLETTE_CUT_GEM
  • RECTANGULAR_CABOCHON

  • POINT_CUT_GEM
  • OVAL_CABOCHON

Based on this, is the article incorrect in its assessment of how cuts are decided? It would seem "brilliant" is never used alone, and "rose" isn't on our list. I would like someone to check my findings before I edit the article, since I'm not that experienced with looking into the raws. Thanks. --timrem 01:09, 14 April 2012 (UTC)

Moving large gems

Large gems can be used as bait in animal traps, upon destruction of the animal trap, this gems is dropped next to where the animal trap was. So, this is a method for moving gems, though not a very reliable one. Also 'large gems' can be chosen as one of the types of 'finished goods' for a stockpile. Once a large gem is encrusted with other items, dwarves will move it to such a stockpile.

Rarity of gems

I've done some tests with the prospect tool of DFHack on four different locations. Certain gems, like the grossulars and Goshenite, which seem to spawn on marble, are exceedingly rare. Not found a single grossular, I only found Goshenite on 2 maps, one having 3 gems and the other having 133, being at most the third least abundant gem in the map.

I remember there was some sort of bug where a sort of mineral wouldn't spawn due to the presence of another (can't remember but I believe it's related with silver or tin), maybe this is related.

Also, I remember that gems increase the scarser mineral frequency is, although again I don't have the source for this, although it would make sense as most gems don't spawn within mineral clusters.

I could post the prospects (as I've piped them to text) but the map was custom-made, hence somewhat unreliable.--Doktoro Reichard (talk) 16:36, 11 January 2014 (UTC)

I've picked up the good work made by Shandra, treated it according to gems, and found some results. However, those results are... ugly, to say the least. I'll try to supply the Excel spreadsheet, as graphing the results is really really ugly, but I can safely assume the following:

  1. Biomes affect the gem distribution. As I didn't find some varieties of Diamonds or Agate in any of the samples, stands to reason that even by messing with mineral frequency one can't make gems appear where they don't belong (e.g. agates can only appear in sedimentary layers).
  2. Mineral Scarcity affects the distribution in a strange way. Some gems like Onyx will only appear, and at low quantities, at the lowest setting (hence the biggest frequency), although this might be related to the former point. Other gems, such as Bandfire opal seem to have some sort of tiers, that actually increase with decreasing mineral frequency. And there are others that peak at intermediate ranges.

The dataset, however, is quite noisy, and fails because it's a single location, and as such can not encompass all different types of layers. If one were to take the maximum value of the gems in all the sets, it would come out something like the following:


In regards to what lead me here, Cinnamon grossulars happen to be infrequent (and not as rare as I thought), as it sits in the middle of the table, but as I said earlier, I did search some sites and found no evidence of it's existence. Also, these grossulars seem to appear only on Mineral Scarcity ranges nearing 25000 (e.g. Rare to Very Rare). This would benefit from a more extensive search, but for now this is what exists so far.--Doktoro Reichard (talk) 16:07, 12 January 2014 (UTC)

Finally got around to add the .xls in a Dropbox. The file is here. Besides the data presented above, there is data on all distributions by scarcity. It's very very ugly though.--Doktoro Reichard (talk) 14:55, 17 January 2014 (UTC)

Change in gem values?

I'm not sure whether this affects more than one type of gems but I just found a pipe opal and it's value is 30 instead of ten (v 40.19). Does someone know if there was a change? If so, it should be updated.--Afghani84 (talk) 20:19, 11 January 2015 (UTC)