Built from GemID's property database for the GIA, Gem-A FGA and FEEG practical exams. Import into Anki or Quizlet — free.
Anki: File → Import → pick the .tsv → set field separator to Tab. Field 1 is the front, field 2 the back.
Quizlet: Create → Import → paste the file's contents → set Tab between term and definition, New line between cards.
Prefer a printable reference? One-page property cheat sheet →
Or browse every confusion pair on the web: how to tell gemstones apart →