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RTP 
Gem Blast by Endorphina is a five-reel, three-row slot with 10 paylines that pay in both directions, from left to right or right to left. The game uses gemstone symbols alongside classic 7 and BAR icons, with payouts based on matching three, four or five symbols across active lines.
The main special feature is the Diamond Star wild, which substitutes for all other symbols and appears on reels 2, 3 and 4. When triggered, it expands across the reel and can launch up to three re-spins. Some casinos may also offer a jurisdiction-dependent BONUS POP feature.
This demo version lets players play for free and practice before playing for real money. Gem Blast also includes a Risk Game bonus round, where four cards are dealt and a selected card can double the current win, with the total increasing through repeated rounds up to ten times if the dealer is beaten.
