Online slots players hope to hit big payouts. That is why slot games depicting themes of wealth are very popular. One such theme is the lifestyle of the rich. Another theme is that of mining for gold or precious stones. This article reviews some mining themed online slots from the leading software providers.

In Fortune Finder from Microgaming you can select one from gold, ruby and diamond. The chosen symbol becomes the wild. The other thematic symbols include the mine cart, pan of precious stones, dynamite sticks and pick axe. The miner is the scatter symbol. When three or more miner symbols appear anywhere on the reels you are awarded up to 25 free spins with doubled payouts. The free spins can be retriggered. Fortune Finder offers the Microgaming gamble game in which players can try to double or quadruple their payouts.

The mining themed slot game from software provider Realtime Gaming is Paydirt. The symbols are the standard mining symbols and include mine entrance, miner, outlaw, donkey, mine cart, dynamite, pan, lantern and pick axe, but have been depicted with a comic touch. The gold nugget is the wild symbol. It appears only on reels 2 and 4, but triples payouts. The Paydirt logo is the scatter symbol and it triggers one of three bonus games. Gold Rush awards 12 free spins with the wild symbol appearing stacked on the reels. Gold Fever awards five free spins in which the third reel is held as wild. Strike It Lucky awards 10 free spins with a second wild symbol. This online slot game offers a randomly triggered progressive jackpot.

The software provider Playtech has a slot game titled Hot Gems in its portfolio. It is the latest of the slots reviewed here and is visually more attractive with plenty of animations. The introductory clip is an explosion of hot gems. The thematic symbols include miner, lantern, pick axe and mine cart. Colorful gems have been used instead of the usual high value card symbols. The Wild logo is the wild symbol, the Hot Gems logo is the scatter symbol and the Free Games logo and triggers the free spins. Hot Gems features the Collapsing Reels feature. The symbols that make up winning combinations vanish, leaving empty spaces that are filled by other symbols. This process can repeat indefinitely. In the free spins each collapsing of the reels increases the multiplier by one.