The Power of Colour

Colour is a great way to make your jewellery pop. We caught up with two designers – Marie Cabirou and Selim Mouzannar – who have both infused newness into their popular collections.…

Oiled Spinel

When it comes to clarity enhancement with oils and resins, a common belief is that the refractive index of the host gem must match that of the filler. If one follows this…

Tree in Rock Crystal Quartz

The unusual quartz cabochon shown in figure 1 displays visually appealing dendritic inclusions that resemble trees. This inclusion scene is an excellent example of pareidolia, the tendency to assign familiar shapes to…

Man-Made “Inclusion”?

Two important internal features in gemstones are inclusions and fissures. Inclusions are an important source of information in the gemological evaluation process. They can often provide indications about geographic origin (see, e.g.,…