Below are some bona fide and FREE "INFO LINKS" which constitute the PGA's course. 
New information will also be added to the Info Links along with associated questions & answers.

INTRODUCTION ©1995 Ancient Astrological Gemstones & Talismans SIDEREAL ASTROLOGY ©1995 Ancient Astrological Gemstones & Talismans WHAT IS VEDIC ASTROLOGY -  ©by Shyamasundara Dasa  BIRTHSTONES ©1995 Ancient Astrological Gemstones & Talismans GEMSTONE POWERS  ©1995 Ancient Astrological Gemstones & Talismans GEMSTONE CLARITY ©1995 Ancient Astrological Gemstones & Talismans VEDIC PLANETARY GEMSTONE TALISMANS  ©1995 Ancient Astrological Gemstones & Talismans HOW TO CHOOSE YOUR PLANETARY GEM   ©1995 Ancient Astrological Gemstones & Talismans Jyotish Gem Powers (At a glance) by Das Goravani ANCIENT VEDIC GEM LORE  ©1995  Ancient Astrological Gemstones & Talismans MODERN GEMOLOGICAL DATA  ©1995  Ancient Astrological Gemstones & Talismans GEMSTONE NARRATIVES  ©1995  Ancient Astrological Gemstones & Talismans CRYSTALS ©1995 Ancient Astrological Gemstones & Talismans Explanation of Pratikul / Anukul Gem Choosing  ©2001 by Howard Beckman GEM THERAPY  ©2000  Vibrational Healing with Gems by Howard Beckman FADIC NUMBERS & GEMS©2000 G. Kumar RATNA-ARPANA - Donating gems to appease harmful (pratikul) planets ©2000 R. Brown PLANETARY MANTRAS, CHARITY & FASTING  ©1995 Ancient Astrological Gemstones & Talismans GEMSTONE COLOR & CLARITY ©1996 by  Richard S. Brown NATURAL (JYOTISH) PEARLS  ©1996 by Richard S. Brown The "Other" Pearls ©1996 by  Richard S. Brown THE PLANETARY HERBS ©1974  Information and samples courtesy of the Nepal Ayurveda Association Sri Shalagram Shila - ©1995 Ancient Astrological Gemstones & Talismans Sri Shalagram Shila-II: ©2001 Sri Shaligram Tirtha Pradarshini - NEW SITE ON SACRED STONES Sri Kailasa Shila : ©1996  by Richard S. Brown Sri Rudraksha Mani - 6 mukhi  ©by AstroMandir Bibliography  ©1995  Ancient Astrological Gemstones & Talismans PGA Dictionary ©1995  Ancient Astrological Gemstones & Talismans