Recently the authors examined a 4.8 cm tall pale blue sapphire crystal (figure 1) that…
COLOURED GEMSTONES
Numerous gem materials have been designated “trapiche” in the trade and in various publications. They…
Recently examined in the Carlsbad laboratory was a 26.72 ct transparent violet modified cushion mixed-cut…
A white, non-nacreous baroque pearl weighing 15.53 ct and measuring 19.54 × 13.26 × 11.57…
Amplified with an assortment of precious gemstones, pearls and polkis, jadau jewellery still retains a…
The Carlsbad laboratory received for examination two dark-colored bead cultured pearls embedded with an electronic…
When it comes to clarity enhancement with oils and resins, a common belief is that…
The micro-world of gemology is fascinating and often mimics scenery, landscapes, or, in this case,…
The unusual quartz cabochon shown in figure 1 displays visually appealing dendritic inclusions that resemble…
Two important internal features in gemstones are inclusions and fissures. Inclusions are an important source…