GemCheck PoE Transfigured Gem is a Firefox extension designed for players of Path of Exile, enhancing the gem transfiguration process at the Divine Font. This tool overlays a floating panel on the skill gem price page of poe.ninja, providing instant insights into which transfigured gems are worth pursuing. It offers two transfiguration methods: Color Roll and Specific Roll, calculating expected values and hit probabilities to assist users in making informed decisions before running the Labyrinth.

The extension features a comprehensive overview of transfigured gems, including a Color Roll Bingo for each gem color, a ranking of base gems sorted by expected value, and detailed filters for gem level and quality. Additionally, it provides live pricing data, auto-detects league information, and allows for customization of displayed items. GemCheck is a valuable asset for players aiming to maximize their gains in the ever-evolving economy of Path of Exile.