What is the difference between not burning rubies and burning rubies?

I think the differences between them are as follows:

1, quality and value: unfired rubies are of high quality; The quality and value of burnt rubies are very low.

2. Treatment method: unburned rubies are not heated; There is also burning rubies to improve the quality by heating.

3, rarity and price: unburned rubies are rare and expensive; Burning rubies is more common and the price is low.

4. Appearance and durability: burnt rubies may have cracks or inclusions, which will affect the appearance and durability; Unburned rubies are more durable.