The second green crystal is called aventurine. Aventurine is a form of quartz that is known for its sparkly appearance due to the presence of mica or other minerals. It is often used in jewelry and is believed to bring luck and prosperity to the wearer. Aventurine is also associated with the heart chakra and is believed to promote emotional healing and balance. **

The green-brown crystal in the image appears to be a form of smoky quartz. Smoky quartz is a variety of quartz that ranges in color from light gray to brown to black. The greenish hue in this crystal could be due to impurities or inclusions within the quartz. Smoky quartz is known for its grounding and protective properties, making it a popular choice for crystal healing and spiritual practices. **

The crystal green-transparent-milky stripe you are describing could be a variety of minerals, but one possibility is fluorite. Fluorite is a colorful mineral that can range from green to purple, and it often has transparent or milky stripes running through it. It is commonly used in jewelry and as a decorative stone. Another possibility is apatite, which can also exhibit similar green and transparent milky qualities. Both minerals are known for their vibrant colors and unique crystal formations. **

To get green aquarium water crystal clear, you can start by reducing the amount of light the aquarium receives, as excessive light can promote the growth of algae. You can also perform regular water changes and clean the aquarium filter to remove any excess nutrients that may be contributing to the green water. Additionally, adding live plants to the aquarium can help absorb excess nutrients and compete with algae for resources, ultimately helping to clear the water. Finally, using a UV sterilizer or adding a water clarifier can also help to clear up green water in the aquarium. **

The mineral in question is fluorite. Fluorite is a colorful mineral that can be found in a range of colors such as purple, green, blue, and yellow. It is known for its cubic crystal structure and is often used in jewelry and carvings due to its vibrant colors. Aventurine and amazonite are different minerals with their own unique characteristics and colors. **

Amethyst is a type of quartz that is typically purple in color, ranging from light lavender to deep violet. Fluorite, on the other hand, is a mineral that comes in a wide range of colors, including purple, green, blue, yellow, and clear. Both amethyst and fluorite are popular choices for jewelry and are valued for their beautiful colors and unique crystal formations. **

The movie you are referring to is likely "The Dark Crystal," a fantasy film directed by Jim Henson and Frank Oz. The story follows a young Gelfling named Jen on a quest to heal the Dark Crystal by returning a missing shard. The crystal in the movie is a powerful artifact that holds the balance of the world in its hands. Its green color and mystical properties play a central role in the film's plot. **

Fluorite has a face-centered cubic (FCC) ion lattice structure. In this structure, the fluoride ions occupy the face-centered positions of the cube, while the calcium ions occupy the body-centered positions. This arrangement creates a strong and stable lattice structure, making fluorite a hard and brittle mineral. **