Article Search Results

Show Filters
Showing 2 results for "*"

Types

Articles (2)

Content Type

Topics

Gemstones

XClear Selections
Titanium-coated tanzanite
Titanium-Coated Tanzanite

For the first time, GIA's laboratory has examined tanzanite color-coated with titanium.

Read More

15 ct tanzanite
Pleochroism in Faceted Gems: An Introduction

Describes the phenomenon of pleochroism and its complex effect on the appearance of colored stones.

Read More