In other words, this slot isn’t about the classic TV show Bonanza. However, the word ‘bonanza’ refers to large amounts of silver ore and is therefore a mining term. And it’s precisely the slightly odd theme of mining that characterises this Big Time Gaming (BTG) slot.

BTG have clearly decided to march to the beat of their own drum here because this is a slot that’s unusual in plenty of ways. It’s a 6-reel slot (also rare) with the symbols appearing on what looks like a quarry. And it’s above the regular symbols that things get quirky once again because there are bonus symbols above those, but only on reels 2, 3, 4 and 5.

Being a mining-themed slot, unsurprisingly the valuable symbols are different jewels. So sapphires, emeralds and rubies, with lower-value card symbols making up the numbers.

The mining references don’t end there because the Wild is a series of dynamite sticks, while the Scatters aren’t just one symbol. Instead, all of the letters making up the word GOLD are Scatter symbols and you’ll need all four to appear on the reels to activate the free spins round. You’ll get 12 free spins to start with, you can get extra ones should you get more Scatter symbols appear and you’ll also get an increased multiplier with each ‘reaction’.

Which brings us to another ‘explosive’ element of the game: the reaction. Each time you secure a win, the symbols making it up blow up, are replaced by others and can lead to an additional win with this continuing on and on, as long as you’re getting new wins.

Rather like mining itself, this is a volatile game and it’s a fine line between finding gold and hitting just rock.