Prospecting for gemstones and minerals/

समान संसाधन

• Gemstones /
  द्वारा: Hall, Cally
  प्रकाशित: (1994)
• Gemstones/
  द्वारा: 374904 Smith, George Frederick Herbert
  प्रकाशित: (1958)
• GEMSTONES of the World /
  द्वारा: Schumann, Walter, author 374781
  प्रकाशित: (1999)
• Encyclopedia of Gemstones /
  द्वारा: Woodward, Pierce, author 639986
  प्रकाशित: (2012)
• Gemstones of the world/
  द्वारा: 374781 Schumann, Walter
  प्रकाशित: (1977)