Exploring different types of mineral luster with visual examples

📚 Quick Study Guide

• ✨ Luster: Describes how light interacts with a mineral's surface.
• 💎 Metallic Luster: Looks like polished metal. Examples: Gold, Pyrite.
• 🌑 Submetallic Luster: Similar to metallic, but duller. Example: Bornite.
• 💡 Vitreous Luster: Glassy appearance. Common in many silicate minerals. Example: Quartz.
• 💧 Resinous Luster: Looks like resin or plastic. Example: Sphalerite.
• 🧸 Greasy Luster: Appears as if coated in oil. Example: Talc.
• Silk Silky Luster: Fine, parallel fibers give a silky look. Example: Asbestos.
• PEARL Pearly Luster: Iridescent, like a pearl. Example: Muscovite.
• EARTH Earthy Luster: Dull, like soil. Example: Bauxite.

🧪 Practice Quiz

1. Which of the following best describes metallic luster?
   1. Looks like glass
   2. Looks like polished metal
   3. Looks like silk
   4. Looks like oil


2. Which mineral exhibits a vitreous luster?
   1. Pyrite
   2. Quartz
   3. Talc
   4. Asbestos


3. Which luster type is associated with a dull, soil-like appearance?
   1. Metallic
   2. Pearly
   3. Earthy
   4. Silky


4. A mineral that looks like it's coated in oil would be described as having what type of luster?
   1. Silky
   2. Greasy
   3. Resinous
   4. Vitreous


5. Which mineral is an example of one that displays a pearly luster?
   1. Gold
   2. Muscovite
   3. Bornite
   4. Sphalerite


6. Bornite is known to exhibit which type of luster?
   1. Metallic
   2. Submetallic
   3. Resinous
   4. Pearly


7. Which of the following minerals displays a resinous luster?
   1. Asbestos
   2. Quartz
   3. Sphalerite
   4. Gold