Opal Mystery

1. Dinosaur_bone + bacteria

1.1. The Opals of Australia documentary of Patrick Voillot

1.1.1. ...

1.1.1.1. ..

1.1.1.1.1. .

1.2. ...

1.3. ..

1.4. .

1.5. Bacteria in a Dinosaur Bone Reignite a Heated Debate

1.5.1. ...

1.5.1.1. ..

1.5.1.1.1. .

1.6. ...

1.7. ..

1.8. .

2. Plankton

2.1. The American Heritage Dictionary entry: plankton

2.2. ...

2.3. ..

2.4. .

3. Plankton + bacteria

3.1. Fossil fuels

3.1.1. ...

3.1.1.1. ..

3.1.1.1.1. .

3.2. ...

3.3. ..

3.4. .

4. Bacteria

4.1. Bacterium

4.1.1. The American Heritage Dictionary entry: bacterium

4.1.1.1. ...

4.1.1.1.1. ..

4.1.2. ...

4.1.3. ..

4.1.4. .

5. Oil not from dinosaur_bones

5.1. Does Oil Really Come From Dinosaurs?

5.1.1. ...

5.1.1.1. ..

5.1.1.1.1. .

5.2. ...

5.3. ..

5.4. .

6. Opal colors

6.1. How Does Opal Get Its Color?

6.1.1. ...

6.1.1.1. ..

6.1.1.1.1. .

6.2. ...

6.3. ..

6.4. .

6.5. Deffraction

6.5.1. The American Heritage Dictionary entry: diffraction

6.5.1.1. ...

6.5.1.1.1. ..

6.6. ...

6.7. ..

6.8. .

7. Opal Mystery

7.1. Unlucky gem

7.1.1. Unlucky Opal - Jewelpedia

7.1.1.1. ...

7.1.1.1.1. ..

7.2. ...

7.3. ..

7.4. .

8. Black Opal

8.1. About Black Opals | Opals

8.1.1. ...

8.1.1.1. ..

8.1.1.1.1. .

8.2. ...

8.3. ..

8.4. .

9. Edwardian Black Opal Ring 1890 - 1900

9.1. `Erie Basin Blog

9.1.1. ...

9.1.1.1. ..

9.1.1.1.1. .

9.2. ...

9.3. ..

9.4. .

10. Opal grinding

10.1. The dream OPAL comes true!

10.1.1. ...

10.1.1.1. ..

10.1.1.1.1. .

10.2. ...

10.3. ..

10.4. .

11. Fake Opal

11.1. How to spot a synthetic opal: 3 tips

11.1.1. ...

11.1.1.1. ..

11.1.1.1.1. .

12. Biggest Opal ever: 568 carats

12.1. The Largest and Most Significant Black Gem

12.1.1. ...

12.1.1.1. ..

12.1.1.1.1. .