An Achene is a single-seeded dry indehiscent fruit in which the seedcoat is not part of the fruit coat. This is the fruit of a Sunflower (Helianthus annuus). Other fruits of this type are: Buttercup (Ranunculus), Clematis (Clematis), Coreopsis (Coreopsis), Dahlia (Dahlia), English Marigold (Calendula), Zinnia (Zinnia).
Pyrite is used in the production of sulfur and sulfuric acid. Pyrite is sometimes an ore of gold and copper.It is also an ore of sulfur, which is used in the production of tires, explosives, disinfectants, medicines, ink, wood preservatives, dyes, matches, and sulfuric acid. Some collector specimens can be quite valuable as well.yrite is used in the production of sulfur and sulfuric acid. Pyrite is sometimes an ore of gold and copper.
Pyrite is a mineral that is often mistaken by many miners as gold. It is usually found with a yellowish hue and has a metallic shine to it which is why some people think of it as gold.t present, though, sulfuric acid is made from other sources instead of pyrite. Paper production is also one industry that makes use of pyrite. Again for its sulfur content, sulfur dioxide is created, and this chemical mixture is used in the making of paper.