The tourmaline is mostly black in color, and the majority of it exists as optically continuous skeletal crystals, but much larger, euhedral pegmatitic tourmaline crystals can also be found in the mountain's numerous, cross-cutting felsic dikes.Embedded in the granite are xenoliths or pieces of foreign rocks entrained in the magma.The carving was considered complete and coincided with the August 1915 lynching of Leo Frank.
This misconception is most likely a result of misrepresentation by granite companies and early park administration.
Stone Mountain, though often called a pink granite dome, actually ranges in composition from quartz monzonite The minerals within the rock include quartz, plagioclase feldspar, microcline and muscovite, with smaller amounts of biotite and tourmaline.
As part of their ceremony, they burned a crude cross.
The influence of the UDC continued, in support of Mrs.
Stone Mountain pluton continues underground 9 miles (14 km) at its longest point into Gwinnett County.