Deposit

Silica

Silica is a deposit with published resource estimates in Tennessee, recorded in the USGS USMIN rare earth element occurrence database (ver. 4.0, June 2019).

Facts on this page last re-verified Aug 12, 2026 — the oldest verification date among its current claims. How we verify.

Location: Tennessee, United States (36.040, -88.177 approx.)

Commodities: phosphate; rare earth elements

Deposit model: monazite-bearing stream placers · unclassified

Published resource estimates

As compiled by USGS USMIN from the cited studies. Resource classes follow the source; "approximate" flags values USMIN reports as approximations. These are not current company reserve statements.

Material	Class	Amount	Grade	Contained	As of	Reference
monazite	Unclassified	26,700,000 t	0.013 percent	3,470 metric tons monazite	Jan 1, 1989	Orris and Grauch (2002), Page 154, Appendix A — Orris, G.J., Grauch, R.I., 2002, Rare earth element mines, deposits, and occurrences: U.S. Geological Survey Open-File Report 02-189, 167 p. http://pubs.usgs.gov/of/2002/of02-189/.

Record imported from USGS USMIN ver. 4.0 (June 2019). Developments after that date appear on facility records, not here; see the methodology.

Sources

U.S. Geological Survey · published Jun 1, 2019 · retrieved Aug 12, 2026 · archive unavailable: Wayback snapshot 20260427015518 of the ScienceBase item exists but the archive service returned 503 on verification 2026-08-12; recheck on a weekly pass