Generally, the symbols are made up of colourful rocks which also have a gem imbedded into the body of the rock, however players will want to find the Monster Rock that will turn up randomly to create some worthwhile wins. The main reels are surrounded with rocks which are created from a blue grey shade of rock that nestles with the sun setting in the background, these are studded with more precious jewels, however to the left there is a win-meter. The 6x4 grid offered in Gem Rocks sees the symbols tumbling into place with an accompaniment of clicking sounds and generic styled music. The amount that players can win is dependent on the number of matching symbols can be seen on the connected reels starting from the left and how many symbols can be seen on a single reel within the row.
Players will be awarded for any three of a kind they manage to land, and the prize will increase when 4, 5, or 6 of the same symbol are in place, that’s not all though, if any of the reels display more than a single winning symbol the prize is then multiplied, for example landing two of the same symbol means that the prize will be doubled and so on, leading to some good chances for big wins. It is also quite common for giant symbols to land in 2x2, 3x3 or 4x4 blocks making it easy for players to land the high value wins.
The value of the symbols in Gem Rocks vary with the purple diamonds and brown cross paying out 5,10, 15 or 20 coins for landing 3, 4, 5 or 6 on the reels moving from the left, then comes the aquamarine, blue, green and white gems which are worth a bit more. The crescent moon styled gem will pay out 10 through to 35 coins but the best paying symbol is the red star which is worth 20, 40, 60 or 200 coins, now that is impressive. Gem Rocks does not have the conventional wild or scatter symbols and there is no free spin, but this is made up for from the additional bonus features that are available to players.
The cascading reel feature is particularly worth while as any symbols that become part of a winning combination will disappear so that new symbols can drop down into the space. With each winning symbol that disappears comes a small explosion and a pause whilst the new symbols drop into place. If these new symbols create another winning line, there is a bar that will light up in the win meter on the left-hand side of the screen and a Monster Rock creature appears on the reels. With the massive 4,096 ways to win over the 6-reels this slot machines may appear slightly overwhelming to begin with but as soon as the connections begin to fall into place the whole online slots begins to make a lot of sense and whilst working out several multipliers when identical symbols land can take a little while to get used to.