Obsidian, jade, and turquoise are all materials that__________.
A) originated near a volcanic source
B) are relatively easy to source geochemically
C) can be worked to a sharp edge
D) are perishable in acid soils
E) occur only in Inca sites
The Elgin Marbles __________.
A) were returned to Greece in the 1920s
B) are still on display in the British Museum
C) were taken as part of an act of war
D) originally stood outside of the Coliseum
E) were the key to deciphering ancient Egyptian hieroglyphics
Obsidian hydration analysis provides estimates of __________.