LUSTRE BLOG / gemstone charts

Before the 20^th century, all gems in the brown, orange, and yellow colour range were called topaz. Modern gemology was only recognized as a science in the 1930s. Today we know that topaz and brown quartz are actually two different gemstones. Citrine  is less likely to be confused with Topaz today, but it does happen. 

June is one of the few months, that counts 3 gemstones as its birthstone. For a...