2 rainbow agate tumble stones

**Rainbow Agate** is a stunning variety of banded chalcedony (a type of quartz) known for its vibrant, iridescent colors that shimmer like a rainbow. Here’s a detailed breakdown:
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### **1. Overview**  
- **Composition**: Silicon dioxide (SiO₂), the same as all agates, but with unique light-diffracting layers that create rainbow effects.  
- **Color**: Multicolored bands (often blues, purples, greens, golds) with a metallic or holographic sheen.  
- **Cause of Iridescence**: Thin layers of silica or mineral inclusions (like goethite or hematite) refract light, similar to oil on water.  
- **Hardness**: 6.5–7 on the Mohs scale (durable for jewelry).  
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### **2. Key Features**  
- **Iridescence vs. Dye**: Natural rainbow agate gets its colors from light interference, while some dyed agates are mislabeled as "rainbow."  
- **Banding**: Classic agate stripes, often with translucent layers.  
- **Sources**: Found in **Mexico, Brazil, India, and the U.S. (Montana, Oregon)**.  
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### **3. Metaphysical Properties**  
- **Energy**: Believed to amplify joy, creativity, and emotional healing.  
- **Chakras**: Associated with the **crown chakra** (spiritual connection) and **heart chakra** (love).  
- **Uses**:  
  - Meditation: Enhances positivity and self-acceptance.  
  - Jewelry: Worn as a "mood booster" or protective talisman.  
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### **4. Uses & Care**  
- **Jewelry**: Popular as cabochons, pendants, and beads.  
- **Decor**: Polished into bookends, spheres, or slices for display.  
- **Care**:  
  - Avoid harsh chemicals or prolonged sunlight (may fade iridescence).  
  - Clean with mild soap and water.  
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### **Fun Fact**  
Some rainbow agates are nicknamed "fire agate" or "iris agate" due to their play-of-color, though true fire agate has botryoidal formations.