You may receive up to 12 crystals, all of the same type.
When you sign up for the test, the University grants you 2 crystals.
Thereafter, you may request up to 5 more pairs from a school of Architecture. You may ask for the first pair immediately, but must thereafter wait 24 hours before the school will grant you the next pair. (The school will tell you how long you have to wait.)
There are 20 different types of heiroglyph:
Amen Ra | Anubis | Bastet | Bes | Buto |
Dua | Hapy | Hathor | Horus | Isis |
Maat | Min | Montu | Osiris | Set |
Shu | Sobek | Taweret | Thoth | Wepawet |
Crystal Heiroglyphs are used by installing them in a Statue of Octec's Ghost. Installing 1 each of all 20 heiroglyphs activates the statue and passes the test for the builder of the statue.
In Tale 1, there was an additional reward for installing a second set of 20 (40 total, 2 of each). This is being investigated for this telling.