Blog
Latest Blog Posts
Reverse Alexanderite Color Change Gemstone, Cuprian Tourmaline from Mozambique, Laurellite
In this post I will limit myself to a simple truth that has not been picked up by the internet and how it continues to propagate an older theory of color change that CAN NOT BE TRUE. I will not write about the proposed theory of why color change occurs in gemstones,...
Copper Diffusion in Tourmaline
Copper is not a common chromophore in gemstones. A chromophore is some impurity or imperfection that causes the gemstone to have color. With the discovery that naturally occurring feldspar can be enhance threw the diffusion of copper into its matrix, it followed for...
Observations on the Color Change phenomenon in Tourmaline.
On this page I will present my observations on color change in tourmaline. I will be covering the following four spectral areas of change, red to orange, yellow/brown to green, green to blue, blue to purple (Laurellite). The last one is a recent discovery, since the...
Zen and the polishing of long thin facets.
I have run into many pieces of tourmaline rough that appear to be well-shaped to cut an emerald cut with great weight retention, but they have an awkward length to width ratio. I generally shy away from this kind of rough because of technical problems in both cutting...
The Specialty Of The House Is Truth In Tourmaline
This dark flash driven green emerald cut is a Dravite, the species, and displays the usambala effect. It appears to be eye clean and weighs 1.12 carats. This is the tourmaline in my collection that I will use in the following discussion on this page. It weighs 1.12...
Recent Comments