YourGemologist QuickQuiz Isomorphous Replacement Series

Which of the following gem groups is an isomorphous replacement series group?
Diamonds
Rubies
Topaz
Amethyst

Which of the following properties do not change with an isomorphous replacement group?
Refractive index
Specific gravity
Color
Crystal system formation

A garnet consisting of magnesium aluminum silicate is a member of which garnet group?
Alamandine
Pyrope
Uvarovite
Spessartite

Rhodolite is considered by many to be a combination of which of the garnet groups?
Pyrope/Almandine
Spessartite/Pyrope
Andradite/Almandine
Uvarovite/Spessartite

Which of the following garnet groups would you expect to be colored green due to chromium content?
Uvarovite
Pyrope
Almadine
Adradite

Which of the following IS NOT a member of an isomorphous replacement group?
Pink tourmaline
Pink topaz
Pink sapphire
None of the above

What is the one element that ties all of the garnet group together as an isomorphous replacement group?
aluminum
iron
magnesium
silicon oxide

The garnet with the chacteristic \"horse tail\" inclusion of asbestos is called a:
Rhodolite
Demantoid
Tsavorite
Hessionite

Which property of a gemstone within an isomorphous replacement group will change most often?
Color
Chemical make-up
Inclusions
Crystal system formation

The orange-red color of garnet is most often seen from the family called:
Almandine
Pyrope
Uvarovite
Spessartite

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Since September 19, 2000, there have been multiple choice activities generated by this program .