Deposit

Piedmont

Piedmont is a deposit with published resource estimates in North Carolina, recorded in the USGS lithium deposits in the United States selected-sites dataset (2020 release).

Facts on this page last re-verified Aug 18, 2026 — the oldest verification date among its current claims. How we verify.

Location: North Carolina, United States (35.392, -81.288 approx.)

Commodities: lithium; quartz; feldspar; mica

Deposit model: lithium-cesium-tantalum (LCT) pegmatite · unclassified

Geology

“Within the Project, spodumene pegmatites are hosted in a fine to medium grained, weakly to moderately foliated, biotite, hornblende, quartz feldspar gneiss or commonly referred to as amphibolite. The spodumene pegmatites range from fine grained (aplite) to very coarse-grained pegmatite with primary mineralogy consisting of spodumene, quartz, plagioclase, potassium-feldspar and muscovite.” (Piedmont Lithium Ltd. (2018))

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
lithium oxide (Li2O)	Inferred	—	1.09 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018), Page 8 — Piedmont Lithium Ltd., 2018, Scoping study delivers outstanding results: Piedmont Lithium Ltd., 41 p., accessed December 14, 2018 at https://d1io3yog0oux5.cloudfront.net/_d57180597b7165a320861bcfeeeb1d58/piedmontlithium/db/336/2393/pdf/180719+-+Scoping+Study+Press+Release_FINAL.pdf
quartz (SiO2)	Indicated	—	30.3 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018b), Page 9, Table 2 — Piedmont Lithium Ltd., 2018, Annual Report 18: Piedmont Lithium Ltd., 69 p., accessed December 17, 2018, at https://d1io3yog0oux5.cloudfront.net/_0a855062042c19aa580d49da770dfe40/piedmontlithium/db/338/2408/pdf/PLL+Annual+Financial+Report+2018_+FINAL_MERGED.pdf
feldspar	Inferred	—	44.4 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018b), Page 9, Table 2 — Piedmont Lithium Ltd., 2018, Annual Report 18: Piedmont Lithium Ltd., 69 p., accessed December 17, 2018, at https://d1io3yog0oux5.cloudfront.net/_0a855062042c19aa580d49da770dfe40/piedmontlithium/db/338/2408/pdf/PLL+Annual+Financial+Report+2018_+FINAL_MERGED.pdf
lithium oxide (Li2O)	Indicated	—	1.15 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018), Page 8 — Piedmont Lithium Ltd., 2018, Scoping study delivers outstanding results: Piedmont Lithium Ltd., 41 p., accessed December 14, 2018 at https://d1io3yog0oux5.cloudfront.net/_d57180597b7165a320861bcfeeeb1d58/piedmontlithium/db/336/2393/pdf/180719+-+Scoping+Study+Press+Release_FINAL.pdf
quartz (SiO2)	Inferred	—	30 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018b), Page 9, Table 2 — Piedmont Lithium Ltd., 2018, Annual Report 18: Piedmont Lithium Ltd., 69 p., accessed December 17, 2018, at https://d1io3yog0oux5.cloudfront.net/_0a855062042c19aa580d49da770dfe40/piedmontlithium/db/338/2408/pdf/PLL+Annual+Financial+Report+2018_+FINAL_MERGED.pdf
mica	Inferred	—	4.5 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018b), Page 9, Table 2 — Piedmont Lithium Ltd., 2018, Annual Report 18: Piedmont Lithium Ltd., 69 p., accessed December 17, 2018, at https://d1io3yog0oux5.cloudfront.net/_0a855062042c19aa580d49da770dfe40/piedmontlithium/db/338/2408/pdf/PLL+Annual+Financial+Report+2018_+FINAL_MERGED.pdf
feldspar	Indicated	—	43.5 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018b), Page 9, Table 2 — Piedmont Lithium Ltd., 2018, Annual Report 18: Piedmont Lithium Ltd., 69 p., accessed December 17, 2018, at https://d1io3yog0oux5.cloudfront.net/_0a855062042c19aa580d49da770dfe40/piedmontlithium/db/338/2408/pdf/PLL+Annual+Financial+Report+2018_+FINAL_MERGED.pdf
mica	Indicated	—	4.4 percent	—	Jan 1, 2018	Piedmont Lithium Ltd. (2018b), Page 9, Table 2 — Piedmont Lithium Ltd., 2018, Annual Report 18: Piedmont Lithium Ltd., 69 p., accessed December 17, 2018, at https://d1io3yog0oux5.cloudfront.net/_0a855062042c19aa580d49da770dfe40/piedmontlithium/db/338/2408/pdf/PLL+Annual+Financial+Report+2018_+FINAL_MERGED.pdf

Exploration and site history

Exploration — Exploration drilling on the site has occurred in three drilling campaigns with 229-holes being drilled for 35,293 m, 2009–2010 (Piedmont Lithium Ltd. (2018))
Evaluation — JORC compliant report, 2018 (Piedmont Lithium Ltd. (2018))

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, 2020 · retrieved Aug 18, 2026 · archive