02138cam a22003013u 450000100060000000300070000600500170001300600020003000700050003200800410003704000110007804100170008905000070010610000290011324500590014226400510020130000470025233600260029933700260032533800360035150000310038750801880041852011050060653400450171165300200175685600430177699900170181923626UtSlPG20260610133537.0mcr n260607r2007||||utu|||||o|||||||||||||| d  aUtSlPG 7aen2iso639-1 4aQE1 aMastin, John,d1865-193214aThe chemistry, properties and tests of precious stones 1aSalt Lake City, UT :bProject Gutenberg,c2007  a1 online resource :bmultiple file formats  atextbtxt2rdacontent  acomputerbc2rdamedia  aonline resourcebcr2rdacarrier  aRelease date is 2007-11-26  aProduced by The Online Distributed Proofreading Team at
http://www.pgdp.net. (This file was produced from images
generously made available by The Internet Archive/American
Libraries.)  a"The Chemistry, Properties and Tests of Precious Stones" by John Mastin is a scientific publication written in the early 20th century. The book focuses on the analysis of precious stones, exploring their chemical composition, physical properties, and methods of testing and classification. Mastin aims to provide valuable insight not only to experts in mineralogy but also to the interested layperson.   The opening of the work introduces the definition of what constitutes a precious stone, emphasizing the characteristics that distinguish them from other minerals. The author notes that the value of precious stones is influenced by factors such as their rarity and changing public perceptions. Mastin explains the significance of various physical properties—like hardness, transparency, color, and crystalline structure—in categorizing gems. He sets the stage for a detailed exploration of these themes, indicating that subsequent chapters will delve deeper into specific stones as well as the processes involved in their study and classification. (This is an automatically generated summary.)  nOriginal publication data not identified  aPrecious stones40uhttps://www.gutenberg.org/ebooks/23626  c64678d64678