World auction records for ruby, sapphire and spinel.

A discussion of the definition of padparadscha sapphire, from early to modern times, along with the difficulty in standardizing such definitions.

A brief description of the color types for ruby and sapphire used at Lotus Gemology.

Chinese-language translation of Lotus Gemology's ruby and sapphire color types.

บทคัดย่อเรื่องการจำแนกสีทับทิมและแซฟไฟร์ ที่ใช้ในโลตัสเจมโมโลจี

The story of Richard Hughes' four-decade adventure with jade, from Burma's jadeite mines to China's classic mutton-fat nephrite deposit at Hetian, Xinjiang Province. The work of China's modern jade carving masters is also discussed.

Lotus Gemology's gemologists have lectured extensively about a wide variety of gemological topics including ruby, sapphire, jade, and more.

The history of the Lao sapphire mines at Ban Huay Xai is detailed, along with modern mining by Hong Kong based Sino Resources Mining Corp. Ltd. from 2006–2012.

A Burmese sapphire shows a celestial scene both externally and internally.

An included calcite crystal within an unheated Burmese ruby displays dramatic twinning planes.