Amethyst

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/amethyst

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the scientific classification?A violet variety of quartz (silicon dioxide, SiO2)
2. What is the coloring agent?Iron impurities within the crystal lattice, often combined with irradiation
3. Why is amethyst purple?The purple color comes from tiny amounts of iron inside the crystal, and sometimes from other elements or light exposure. The more iron and the more oxidation, the deeper the purple.
4. How does amethyst form?Amethyst forms in empty spaces inside volcanic rocks when hot, silica‑rich fluids cool and crystallize. The crystals grow into hexagonal shapes inside the cavities.

Hydrothermal Fluids: Hot, mineral-rich water that circulates through the Earth's crust, aiding crystal formation.
Crystal Lattice: The highly ordered, repeating arrangement of atoms or molecules within a crystal.
Vitreous Luster: A shiny, glass-like appearance characteristic of many minerals, including quartz.