Spinel Falls is a 40-foot wet-weather waterfall located on a headwater tributary of Holcomb Creek just north of Hope Diamond Falls. It lies in an extremely dense rhododendron thicket and requires a tough bushwhack to reach. Although one might attempt to access it on the way to Hope Diamond Falls, I've instead heard the bushwhack may be marginally easier from the Bartram Trail. This one is for hardcore waterfallers only.

For detailed directions, see page 357 in Mark Ozboyd's "Waterfalls of Georgia" guidebook.