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Gemstones draw many people into the hobby. This page collects the guides for finding them and checking what you have found.
Look for the clues in each article, then compare with the value guide before you spend money or time.
Agate and jasper
Learn where agates collect, how to identify agate and how to identify jasper.
Crystals and geodes
See where to find amethyst, how to find geodes and how to identify garnet.
Opal and turquoise
Read opal and turquoise guides before buying or trading.
Real or fake
Use the glass test and read what makes a gemstone valuable.
Gemstones at a glance
| Gemstone | Read this |
|---|---|
| Agate | Agate |
| Jasper | Jasper |
| Garnet | Garnet |
| Turquoise | Turquoise |
Checking a possible gem
- Look at color and luster
- Test hardness
- Compare with look-alikes
- Ask an expert before selling
Good habits
- Keep finds clean and labeled
- Learn the common fakes
- Handle soft stones gently
- Check collecting rules first
Questions readers ask
How can I tell a gem from glass?
See how to tell quartz crystal from glass for easy checks.
What makes a stone valuable?
Color, clarity, rarity and demand all matter. This guide explains each.