![A miner puts on his hard hat and light in the lamp room of Tower Colliery deep coal mine at Hirwaun South Wales Stock Photo - Alamy A miner puts on his hard hat and light in the lamp room of Tower Colliery deep coal mine at Hirwaun South Wales Stock Photo - Alamy](https://c8.alamy.com/comp/AHY9F7/a-miner-puts-on-his-hard-hat-and-light-in-the-lamp-room-of-tower-colliery-AHY9F7.jpg)
A miner puts on his hard hat and light in the lamp room of Tower Colliery deep coal mine at Hirwaun South Wales Stock Photo - Alamy
![Bonhams : The most valuable hat ever offered at public auction: "Deep Blue Sea" – an extraordinary hat bejeweled with 1447 carats of gem-quality Lightning Ridge Opal Bonhams : The most valuable hat ever offered at public auction: "Deep Blue Sea" – an extraordinary hat bejeweled with 1447 carats of gem-quality Lightning Ridge Opal](https://images2.bonhams.com/image?src=Images/live/2010-09/16/8162044-1-1.jpg&width=640&height=480&autosizefit=1)
Bonhams : The most valuable hat ever offered at public auction: "Deep Blue Sea" – an extraordinary hat bejeweled with 1447 carats of gem-quality Lightning Ridge Opal
![Amira 👾 on Twitter: "I finally have one of the rarest items in the entire game. 🙀 Miner's Hat of the Deep. It's so ugly, lmao. 😅 #uldaman #worldofwarcraft #collector #forthehorde https://t.co/18uqJYXTlV Amira 👾 on Twitter: "I finally have one of the rarest items in the entire game. 🙀 Miner's Hat of the Deep. It's so ugly, lmao. 😅 #uldaman #worldofwarcraft #collector #forthehorde https://t.co/18uqJYXTlV](https://pbs.twimg.com/media/DoJirumWsAAonQb.jpg)