Here's a breakdown of the most notable ruby sources:

* Myanmar (Burma): The Mogok Valley in Myanmar is renowned for producing some of the world's finest rubies, known for their vivid red color and high clarity.

* Thailand: Thailand is another significant ruby producer, with deposits in Chanthaburi and Ratchaburi provinces.

* Afghanistan: The Panjshir Valley in Afghanistan is known for producing rubies with a distinct purplish hue.

* Vietnam: Vietnam also has ruby deposits, particularly in the Luc Yen region.

* Madagascar: Madagascar produces rubies of various colors, including pink, orange, and purple.

* Tanzania: Tanzania is a notable source of rubies with a distinctive "pigeon blood" red color.

While these are some of the largest and most famous ruby deposits, there are also smaller deposits found in countries like India, Sri Lanka, Pakistan, and Australia.