HTS Number	Description	Unit of Quantity	General Rate of Duty	Details
2506	Quartz (other than natural sands); quartzite, whether or not roughly trimmed or merely cut, by sawing or otherwise, into blocks or slabs of a rectangular (including square) shape:
2506 1000	Quartz		Free
2506 1000.10	Sands (other than natural) containing by weight 95 percent or more of silica and not more than 0.6 percent of oxide of iron	t	Free	More
2506 1000.50	Other	t	Free	More
2506 2000	Quartzite		Free
2506 2000.10	Crude or roughly trimmed	t	Free	More
2506 2000.80	Other	t	Free	More