Fragment

Volcanic Tuff Fragment

Volcanic Tuff Fragment

Dolomitic marble fragments

Fragments of mortar

white grout mortar coupons

Fragments of concrete

window head sofft on brick and mortar

A fragment of untreated Yellow Limestone from the conueuto column at Mission San Jose in San Antonio, Texas.

A fragment of untreated Yellow Limestone that has been impregnated with resin from a column at Mission San Jose in San Antonio, Texas.