This is a lot of small apache tears in their rough, unpolished form. Apache tear are the popular name for a naturally rounded obsidian, which is a black or dark-colored natural volcanic glass. They are popular stone for tumbling and polishing, and even raw samples like these are used in wire wrap jewelry.
These specimens were from the estate of mineral collector lapidarist, and were collected sometime in the 1970s or 1980s, probably in Arizona. As shown by the scale, most are less than 2cm across. Total weight is about 150gms.