Prepare the Apples
Wash apples thoroughly and dip them in hot water for a few seconds to remove any wax. Dry completely and insert wooden sticks firmly into the tops.

Make the Candy Coating
In a heavy-bottomed saucepan, combine sugar, water, and corn syrup. Stir gently until the sugar dissolves. Attach a candy thermometer and bring the mixture to a boil, without stirring, until it reaches 300°F (hard crack stage).

Color the Candy
Remove from heat and quickly stir in black gel food coloring. Lightly swirl in purple or silver coloring for a marble effect—do not overmix.

Dip the Apples
Tilt the saucepan slightly and dip each apple, rotating it to coat fully. Let excess drip off, then place on a parchment-lined baking sheet to cool.

Set and Serve
Allow the apples to cool and harden at room temperature for about 15-20 minutes before serving.