Nestable 7-Piece Induction Compatible Cookware - Stainless Steel & Slate Black Ceramica Non-Stick Interior. Magma's best fully nesting Gourmet Cookware on the market is now even better. Magma features "Slate Black" Ceramica Non-Stick interiors. Testing has concluded that this darker color has even better non-stick qualities. than the lighter colors and will be more durable over the life of the cookware.. Award Winning. 7-Piece Professional Series Gourmet "Nesting" Stainless Steel Induction. Cook