CS-5: Synthetics and Imitations

Question 1

What are the two main categories of synthetic-gem production methods

Answer 1

1 Melt

2. Solution

Question 2

List the 4 Melt Processes

Answer 2

1. Flame Fusion
2. Pulling
3. Floating Zone
4. Skull Melt

Question 3

Define Flame-Fusion Process

Answer 3

A process in which powdered chemicals are dropped through a high temperature flame onto a rotating pedestal to produce a synthetic crystal. Also known as the Verneuil method. Been around since late 1800s.Still the main method use to create synthetic gemss. Cheaper than other processes.

Question 4

Define Pulling

Answer 4

A process in which the synthetic crystal grows from a seed that is dipped into a chemical melt, then pulled away as it gathers material.

Question 5

Floating Zone

Answer 5

A melt process where a heating unit passes over a rotating solid rod of chemicals until it forms a synthetic crystal.