Tianhe Stone
Commercial name for amazonite from Tianhe, China. Recently offered through the major online platforms. Incidentally, there seems to be quite a bit of difference in…
Category: Gem or Scam? Library
Tanganyika (artstone)
Unregistered commercial name for an ornamental stone better known as anyolite or “ruby in zoisite“. It is actually a metamorphic rock composed of green chromium…
Tiffany Stone
Commercial name for a fine-grained purple to light purple variety of fluorite from Utah, United States. Usually with round patterns and sometimes with small impurities…
White moldavite
Misleading commercial name for low-quality white calcite found in the Mohave Desert in the southwestern United States, among other places. The typical etched structure of…
Super Seven™
Registered trade name used for material purportedly containing the following combination of minerals: quartz, smoky quartz, rutile in quartz (rutilated quartz), amethyst, goethite, lepidocrocite and…
Tiger’s Eye
Common name for a yellow-brown variety of quartz that exhibits chatoyance effect (cat’s eye effect) due to the subparallel ingrowth of quartz crystals and chemically…
Unakite
Name for a green with orange-pink mottled stone that is often referred to as a gemstone or mineral but is actually a metamorphic rock created…
Tourmaline
Name for a group of borosilicate minerals of various colors. The name has been used since the early 18th century, and the name “tourmali” was…
Yooperlite
Registered trademark and commercial fantasy name for a sodalite syenite. A rock with orange-yellow fluorescent sodalite that was “first found” in 2017 by Erik Rintamaki…
Sonora Sunrise
Unregistered commercial name for a combination of red cuprite with teal chrysocolla. That color combination is primarily cut into ornamental stones that suggest a green…
