Question

FILL IN THE BLANKS.
1) A person who studies about crystals is known as a ________.
2) A crystal commonly used in watches is _________.
3) _________ crystals are manufactured from lead crystals, optically cut and polished for use in jewellery making,fine collectibles, chandelier, glasswares etc.
4) ________ crystal from tybol, Australia,is known as the most valuable and is of the highest quality in world.
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Answer 1

Explanation:

1. minerology
2. quartz
4. black opal

Answer 2

Answer:

1. Crystallographers

2. Quartz

3. Swarovski crystal

4. Opal Crystal