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A 5.43 ct Vanadium-doped YAG with an emerald color from Russia (52)
The YAG, an Yttrium-Aluminum Garnet is a man-made material with a garnet structure that does not have its counterpart in nature. It is mainly used in lasers and sometimes in jewelry as diamond...
Red labradorite (plagioclase) - 1.75 ct - Ethiopia (1139)
The red plagioclases (feldspar) are rather rare, vivid red even more. They originate from few locations, Oregon in USA, Democratic Republic of Congo, Tibet / China and more recently (2020) from...
Opalized (petrified) wood from Megyaszó, Hungary (775)
The slice of opalized wood (Figure 1) is reportedly from Megyaszó, Szerencs District, Borsod-Abaúj-Zemplén County, Hungary, likely from Tetlinke Ditch[1]. It shows three distinct parts, a beige to...
Green petrified wood from Gokwe, Zimbabwe (902)
The Gokwe South District in the Midlands, Zimbabwe, hosts a petrified forest, where nice logs of worldwide rare Woodworthia and extremely rare Rhexoxylon were found. The Woodworthia, a primitive...
Silicified coral with transparent chalcedony filling corallite - Indonesia (1064)
The fossilized corals have been quite common in the gemstone market for years. Most of the time, the material is opaque and almost all the structure / anatomy of the calcium carbonate skeletons of...
Green chalcedony with white spherulites drawing orbs - Indonesia (1079)
The cabochon presented in the Figure 1 was cabbed from a rough material seen for the first time in Sainte-Marie-aux-Mines Mineral Show in 2023. The white spots on a transparent green background are...
Ajooba jasper known as conglomerate or fruit jasper - Sabalgarh marble (1932)
The colorfull gemstone cabochon (Figure 1) shows a particular graphical pattern that looks like pistachio slivers in a cake. Such appearance probably gives the 'fruit jasper' name to this...
Spiderweb 'jasper' - another black and white marble (1363)
The black and white spiderweb cabochon (Figure 1) represents a gemstone material which is available as cabochons, tumbled stones or even free-form ornamental gemstones. Compared to other jaspers, with its...
Mesolite spikes on orange thomsonite balls from India, myth or reality? (124)
In june 2024, visiting the Sainte Marie aux Mines Mineral Show, I came accross several pieces of aesthetic minerals showing tiny, long or short colorless needles standing on an orange ball, like an...
Zebra 'jasper' - a black and white marble (1146)
The black and white zebra-striped cabochon (Figure 1) represents a gemstone material which is available as cabochons or tumbled stones. It is quite attractive with its zebra-striped pattern and its...
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