Ch. 27] 



MINERAL PRODUCTION STATISTICS 



489 



TABLE 2 (Continued) 



I A. Continued 



2. Non-metals 



Corundum 



Emery 



Garnet 



Gem stones 



Agate 



Amber 



Beryl (including morganite and aquamarine) .... 



Chrysoberyl (including cat's eye and alexandrite) 



Diamond 



Emerald 



Garnet 



Jade 



Opal 



Ruby 



Sapphire 



Spinel 



Spodumene 



Topaz 



Tourmaline 



Quartz 



Zircon 



Monazite 



Zircon 



Total value of non-metals produced from placers 



B. Gravel and conglomerate 



Building gravel 



Grinding pebbles 



Millstones 



Paving gravel 



Railroad ballast 



Miscellaneous 



Total value of production of gravel and conglomerate 



C. Quartz sand and sandstone 



Sand 



Building sand 



Engine sand 



Filter sand 



Fire or furnace sand 



Glass sand 



Grinding and polishing and sand-blast sand 



Molding sand 



Paving sand 



Railroad ballast 



Others 



None 

 None 

 75,000 ??? 



250,000 ?? 



??? 

 None 

 None 

 None 

 None 

 None 

 None 



??? 



??? 

 None 

 None 

 None 

 None 

 None 

 None 

 None 

 None 

 None 



X 



$ 325,000 



$ 34,400,000 



60,000 ?? 

 10,000 ?? 

 54,300,000 

 6,340,000 

 1,440,000 



$ 96,600,000 



32,000,000 



1,920,000 



285,000 



334,000 



9,540,000 



1,380,000 



9,530,000 



18,000,000 



262,000 



1,750,000 



