Free online Diamond Casino slot machine is developed by Merkur and has 5 reels with 3 rows, and 5 paying lines that cannot be modified. At least 2 or 3 same symbols (depending which one) must appear on a winning line from left to right and side by side so that a profit can be achieved. Diamond Casino slot game’s graphic design is, as expected, inspired with these precious and valuable stones. Symbols To see or check the exact value of each card you have the Paytable button in the left bottom corner. Diamond Casino slot machine game has 13 icons that can be categorized into following categories: Low Win Icons – Regular symbols that often appear on the reels, and you can make small gains with them, but these are often not enough to even compensate your bet.