Gemstones mines in the US: 19 open mines and MSHA citations
Updated November 6, 2026. Source: US Department of Labor, Mine Safety and Health Administration (MSHA), Open Government Data Sets.
MSHA lists 19 open gemstones mines in the US, run by 18 operators and employing 95 people. Since January 1, 2022 its inspectors issued 123 citations and orders there with $21,394 in proposed penalties, and operators reported 11 injury or illness cases. The operators with the most open mines are Coromoto Minerals LLC; Yogold U.S.A. Corporation; Garnet USA LLC. Data from MSHA, November 6, 2026.
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- Open mines
- 19
- Operators
- 18
- Employees
- 95
- Intermittent
- 11
- Temporarily Idled
- 4
- Active
- 3
- NonProducing
- 1
- Mines run by individuals, counted and not listed
- 5
- Citations and orders since January 1, 2022
- 123
- Significant and substantial
- 14 (11.4%)
- Closure orders
- 9
- High negligence or reckless
- 20
- Proposed penalties
- $21,394
- Amount paid so far
- $17,761
- Inspections
- 137
- Inspector hours on site
- 736
- Citations per inspection
- 0.90 (all mines 2.30)
- Accident reports
- 11
- Injury and illness cases
- 11
- Fatalities
- 0
- Latest MSHA record
- October 15, 2026
Operators with the most open mines
Ranked by open mines, then by citations. Sole proprietors and individuals are not listed.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Coromoto Minerals LLC | 2 | 4 | 14 | $2,230 | 0 |
| Yogold U.S.A. Corporation | 1 | 4 | 32 | $5,232 | 0 |
| Garnet USA LLC | 1 | 50 | 24 | $4,322 | 10 |
| New Mexico Travertine Incorporated | 1 | 1 | 9 | $1,755 | 1 |
| Double Eagle Mining LLC | 1 | 2 | 3 | $444 | 0 |
| Dust Devil Mining Company | 1 | 2 | 3 | $427 | 0 |
| Bonanza Opal Mines, Inc. | 1 | 2 | 1 | $151 | 0 |
| Sun Summit Sunstones LLC | 1 | 2 | 1 | $151 | 0 |
| Colton Hill Mining LLC | 1 | 1 | 0 | $0 | 0 |
| Desert Sun Mining and Gems, Inc. | 1 | 12 | 0 | $0 | 0 |
| Glacier Peak Mining LLC | 1 | 3 | 0 | $0 | 0 |
| MVM Artistic Stone Designs, LLC | 1 | 3 | 0 | $0 | 0 |
| Royal Peacock Opal Mine Inc. | 1 | 2 | 0 | $0 | 0 |
Operators with the most citations
Citations and orders issued since January 1, 2022 at their open mines here.
| Operator | Open mines | Employees | Citations since 2022 | Proposed penalties | Injury cases |
|---|---|---|---|---|---|
| Yogold U.S.A. Corporation | 1 | 4 | 32 | $5,232 | 0 |
| Garnet USA LLC | 1 | 50 | 24 | $4,322 | 10 |
| Coromoto Minerals LLC | 2 | 4 | 14 | $2,230 | 0 |
| New Mexico Travertine Incorporated | 1 | 1 | 9 | $1,755 | 1 |
| Double Eagle Mining LLC | 1 | 2 | 3 | $444 | 0 |
| Dust Devil Mining Company | 1 | 2 | 3 | $427 | 0 |
| Bonanza Opal Mines, Inc. | 1 | 2 | 1 | $151 | 0 |
| Sun Summit Sunstones LLC | 1 | 2 | 1 | $151 | 0 |
| Colton Hill Mining LLC | 1 | 1 | 0 | $0 | 0 |
| Desert Sun Mining and Gems, Inc. | 1 | 12 | 0 | $0 | 0 |
| Glacier Peak Mining LLC | 1 | 3 | 0 | $0 | 0 |
| MVM Artistic Stone Designs, LLC | 1 | 3 | 0 | $0 | 0 |
| Royal Peacock Opal Mine Inc. | 1 | 2 | 0 | $0 | 0 |
Mines with the most citations
Open mines, ranked by citations and orders since January 1, 2022.
| Mine | Operator | County | Main commodity | Employees | Citations since 2022 |
|---|---|---|---|---|---|
| Yogo Sapphire Mine | Yogold U.S.A. Corporation | Judith Basin County, MT | Gemstones | 4 | 32 |
| Garnet USA LLC | Garnet USA LLC | Madison County, MT | Gemstones | 50 | 24 |
| Milagro | New Mexico Travertine Incorporated | Guadalupe County, NM | Gemstones | 1 | 9 |
| Mount Mica | Coromoto Minerals LLC | Oxford County, ME | Gemstones | 2 | 8 |
| Crooker Mine | Coromoto Minerals LLC | Oxford County, ME | Gemstones | 2 | 6 |
| Dust Devil Mining Company | Dust Devil Mining Company | Lake County, OR | Gemstones | 2 | 3 |
| Double Eagle Mining | Double Eagle Mining LLC | Lake County, OR | Gemstones | 2 | 3 |
| Bonanza Opal Mines, Inc. | Bonanza Opal Mines, Inc. | Humboldt County, NV | Gemstones | 2 | 1 |
| Sun Summit | Sun Summit Sunstones LLC | Harney County, OR | Gemstones | 2 | 1 |
| Ponderosa Mine | Desert Sun Mining and Gems, Inc. | Harney County, OR | Gemstones | 12 | 0 |
| Topaz Mountain Gem Mine | Glacier Peak Mining LLC | Park County, CO | Gemstones | 3 | 0 |
| Pleiades Mine | MVM Artistic Stone Designs, LLC | Lyon County, NV | Gemstones | 3 | 0 |
| Royal Peacock Opal Mine Inc. | Royal Peacock Opal Mine Inc. | Humboldt County, NV | Gemstones | 2 | 0 |
| Colton Hill | Colton Hill Mining LLC | Oxford County, ME | Gemstones | 1 | 0 |
States
| State | Open mines | Share |
|---|---|---|
| Oregon | 6 | 31.6% |
| Nevada | 5 | 26.3% |
| Maine | 3 | 15.8% |
| Montana | 2 | 10.5% |
| Arkansas | 1 | 5.3% |
| Colorado | 1 | 5.3% |
| New Mexico | 1 | 5.3% |
Citations and injury cases by year
Calendar years since 2022; 2026 runs to the date of the MSHA files.
| Year | Citations and orders | Significant and substantial | Proposed penalties | Injury and illness cases |
|---|---|---|---|---|
| 2022 | 26 | 5 | $5,614 | 2 |
| 2023 | 37 | 2 | $6,898 | 4 |
| 2024 | 23 | 4 | $4,173 | 2 |
| 2025 | 23 | 1 | $3,501 | 2 |
| 2026 | 14 | 2 | $1,208 | 1 |
Standards cited most at gemstones mines
Sections of Title 30 of the Code of Federal Regulations named on the citations, with the part each belongs to.
| Standard | What the part covers | Citations |
|---|---|---|
| 30 CFR 50.30 | Reporting of accidents, injuries and illnesses | 26 |
| 30 CFR 57.12028 | Underground metal and nonmetal mines | 5 |
| 30 CFR 56.12028 | Surface metal and nonmetal mines | 5 |
| 30 CFR 56.9300 | Surface metal and nonmetal mines | 4 |
| 30 CFR 56.14132 | Surface metal and nonmetal mines | 4 |
| 30 CFR 57.14132 | Underground metal and nonmetal mines | 4 |
| 30 CFR 56.12004 | Surface metal and nonmetal mines | 4 |
| 30 CFR 48.28 | Training of miners | 3 |
| 30 CFR 56.14101 | Surface metal and nonmetal mines | 3 |
| 30 CFR 57.8520 | Underground metal and nonmetal mines | 3 |
| 30 CFR 47.44 | Hazard communication | 3 |
| 30 CFR 56.12032 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.20003 | Surface metal and nonmetal mines | 3 |
| 30 CFR 56.15001 | Surface metal and nonmetal mines | 2 |
| 30 CFR 56.4201 | Surface metal and nonmetal mines | 2 |
Injury and illness cases at gemstones mines
Accident reports by degree of injury, as the operator reported them to MSHA.
| Degree | Cases |
|---|---|
| Days away from work or restricted activity | 11 |
What the accident reports at gemstones mines describe
Accident classification, as MSHA codes the circumstances that contributed most directly.
| Classification | Reports |
|---|---|
| Handling of materials | 9 |
| Other | 1 |
| Slip or fall of person | 1 |
Equipment named in accident reports at gemstones mines
| Equipment | Reports |
|---|---|
| Front-end loader | 1 |
| Forklift | 1 |
US government work, public domain. Counts come from the MSHA files published on November 6, 2026. An open mine is one MSHA lists as Active, Intermittent, New Mine, Temporarily Idled or NonProducing; 13,673 were open that day. Citations, penalties, inspections and accident reports run from January 1, 2022. A citation is an inspector's allegation and an operator can contest it; the penalty is the amount MSHA first proposed, before any contest or settlement. An operator is the legal entity MSHA assesses, and a parent company is its controller. Mines run by sole proprietors or by individuals are counted in every total and are not named. This page uses MSHA data and is not endorsed or certified by MSHA. Free to reuse with credit to SpecStream under CC BY 4.0. Spot a wrong value? Write to [email protected] with the link to this page.