Solutions Glassy volcanic rock has 6 entries with similar clues

• 4-letter words
• tuffRock formed from volcanic ash
• 6-letter words
• basaltA dark volcanic rock
• enamelHard baked glassy surface
• 7-letter words
• monoclea singularly glassy looking thing
• lacquerHard glassy coating
• 8-letter words
• obsidianA dark glasslike volcanic rock formed by rapid solidification of lava