Review included. Gronk's Gems slot has 6 reels, 6 rows and % RTP. It comes with Epic Gem wins, as well as 2 unique bonus rounds and a x. A fitting amount. When you land three of Gronk's head anywhere on the reels, you activate the first of them. Gronk's Gems offers a unique and immersive gameplay experience set in a mystical world filled with treasures. . Author: Jon Pill | This review was last updated: 27 Jan Play Gronk's Gems slot for free in demo mode, without spending any money. The Gronk's Gems video slot has two free spins modes. The creative range of bonus features adds additional fun to this magical slot. The game unfolds on a 6×6 grid, utilizing a. Click here for AboutSlots complete slot review & information on where to play it! Play the Gronk's Gems slot for free or real money at online casinos. They have a cave troll! Meet the beefy but friendly, gem-collecting cave troll Gronk! Gronk's Gems is played on a 6×6 grid, has a cascading win. Gronk's Gems is a medium volatile troll slot from Hacksaw. At full whack, Gronk's Gems is capable of firing off wins as high as 7,x the stake, a sort of mid-level amount for a Hacksaw Gaming slot. No download or registration required. Hacksaw Gaming's slot has a strong win potential if you don't mind toying with the.