Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the coin with a € equivalency of 0.30 made of?

### Inputs:
table_name: table, columns: ['Value', '€ equiv.', 'Diameter', 'Weight', 'Composition']

### Response:
SELECT Composition FROM table WHERE € equiv. = 0.30