He mentions orpiment
[TEXT NOT REPRODUCIBLE IN ASCII] as occuring in the same mines in Pontus and Cappadocia, different types of clay [TEXT NOT REPRODUCIBLE IN ASCII]--this word was used exclusively for "red ochre" by previous authors).
Some of them are covered by tiny seligmannite crystals, yellow orpiment
and powdery orange pararealgar.
Gold is associated with weak to moderate silicification, minor disseminated pyrite and minor amounts of orpiment
in well fractured sediments of the Upper Plate Vinini Formation.
Beekman (1992) divides the subject matter covered in the third book as follows: seven chapters on metals, including gold, silver and iron; 13 chapters on minerals, including realgar, orpiment
, alum, pyrite, marcasite, gypsum, quartz, alabaster and asbestos; seven chapters on gemstones, including diamonds, rubies, emeralds, sapphires, chrysoberyl, opal and agates; a remarkable 29 chapers on the unremarkable subject of concretions; and a miscellany of chapters on "curiosities," including stones with unusual shapes, porcelain, salt, amber, glass, etc.
A few scattered rhodochrosites were also on hand, but otherwise it was the same mix of nice Chinese minerals and poor Chinese minerals that we've seen for the last several years: fluorite, stibnite, orpiment
, quartz, calcite, broken bournonite, etc.
Bright yellow crusts of orpiment
partially cover some of the crystal groups, and sharp orpiment
epimorphs after realgar crystals to 2.
Non-metallic associations include orpiment
and, as gangue minerals, quartz, calcite, gypsum, barite and fluorite; native sulfur is a very late-formed member of the suite.
The Shimen realgar mine, which has been in more or less continuous operation for nearly 1500 years, has yielded world-class specimens of realgar and orpiment
, associated with fine calcite crystals, at least since 1988 and as recently as 2006.
coating quartz was described by Gordon (1944).
About 15 years ago, the world began to awaken to China's mineral potential as stunning specimens of realgar and orpiment
, clusters of azurite and huge stibnite crystals up to 1 meter long arrived at international mineral shows.
When the first new mineral specimens from China began appearing on the mineral Western market in the late 1980's and early 1990's, enormous stibnite crystals, fine cinnabar crystals and fascinating specimens of realgar and orpiment
were among the highlights which provided a new impulse to collecting activities.
The characteristic minerals of the mercury deposits include cinnabar, dolomite, quartz, calcite, pyrite, sphalerite, metacinnabar, barite, realgar, orpiment
, stibnite and "asphalt.