| Locality type: | Deposit |
| Classification |
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| Species: | Corundum var: Sapphire |
| Formula: | Al2O3 |
| Comments: | The sapphires are naturally pale, but can be heat-treated to achieve a deeper blue color (MRDS file note).
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| Confirmation |
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| Validity: | Believed Valid |
| Associated Minerals Based on Photo Data: |
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| Garnet Group | ⓘ1 photo of Sapphire associated with Garnet Group at this locality. |
| Data |
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| Mineral Data: | Click here to view Sapphire data |
| Locality Data: | Click here to view Eldorado Bar deposit (Eldorado Strip Mine), Eldorado Bar, East Helena, Lewis and Clark County, Montana, USA |
| Photo Gallery | View Gallery (10 photos) |
| Data Identifiers |
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| Mindat Occurrence Record ID: | 388756 |
| Long-form Identifier: | 1:3:388756:1 |
| GUID (UUID V4): | 52245c49-3d26-450b-9eac-f5323e4caf07 |
| Nearest other occurrences of Sapphire |
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| 6.9km (4.3 miles) | ⓘMissouri River gravel bar, Helena area, Helena Mining District (Spring Hill Mining District), Lewis and Clark County, Montana, USA |
| 8.1km (5.1 miles) | ⓘSpokane Bar (American Gem Corp.; Spokane Bar Sapphire Mine), Lewis and Clark County, Montana, USA |
| 85.0km (52.8 miles) | ⓘDry Cottonwood placer, Dry Cottonwood Creek, Orofino Mining District, Deer Lodge County, Montana, USA |
| 95.5km (59.4 miles) | ⓘSteward Mine, Butte Mining District (Summit Valley Mining District), Silver Bow County, Montana, USA |
| References |
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| Reference Search (possible matching items) |
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 | | Catalog/List | | (Floor, Telephone, HERITAGELive!®, Internet, Fax, and Mail) Monday, October 5 • 4:00 PM CT • Lots 72001–72205...auction results online at HA.com/5434 LOT SETTLEMENT AND PICK-UP New York purchases will be available for...Dallas, TX 75261-6199 This Auction is cataloged and presented by Heritage Auctioneers & Galleries, Inc...(minimum $49), plus 20% of any amount between $300,000 and $3,000,000, plus 12.5% of any amount over $3,000...Kopriva 18107; Roberta Kramer 17439; Brent Randall Lewis 17881; Jennifer Jayne Marsh 17105; Marina Medina |
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Eldorado Bar deposit, Eldorado Bar, East Helena, Lewis and Clark County, Montana, USA