Appraisals of jewelry and precious stones How difficult it is to estimate the value of some of our...

Courses of Diamonds and Colored Gemstones are taught. The duration of the courses is 30 and 40 hours...

Gemology Books Pleasing and didactical colloquial language, highly recommended both for people who...

Just like the colorless cut diamonds, color cut gems are assessed considering the four factors: 4Cs:...