Related Clues:

• Rocks to refine
• Veins of riches
• They're removed via shafts
• Extraction targets
• Miners' quarries
• Tramcar loads
• Metallurgist's raw materials
• They're discovered in vein?
• Vein extractions
• Sources of gold, e.g.
• Miner concern
• Refined finds
• Mined materials
• Some search for these in vein?
• Tramcars' contents