Coral Inclusions in Plastic
An orangy red plastic bead is revealed to be a composite when white coral fragments are identified by spectroscopy and gemological properties.
Coated Rock Crystal Imitation of Ruby
A coated rough rock crystal resembles a purplish red ruby.
Dyed Natural Corundum as a Ruby Imitation
The gemological properties of a new ruby imitation, produced by dyeing natural colorless to pale-colored corundum, are described.
Inamori Synthetic Cat's-Eye Alexandrite
This article reports on a detailed gemological examination of this new synthetic cat's-eye alexandrite.
An Introduction to Simulants or Imitation Gem Materials
This article provides an overview of synthetic gem materials.