This natural Greyish White Howlite originates from United States and its weight is about 5 carats. The measurements are 13.65mm x 9.72mm x 4.38mm (length x width x depth).This gemstone is calibrated to fit 14 X 10 mm jewelry settings. The shape/cut-style of this Howlite is Oval Cabochon. This 4.74ct Howlite gem is available to order and can be shipped anywhere in the world. Gemstone Certification can also be provided as an optional service.
By chemical composition, howlite is a calcium borosilicate hydroxide. It was first discovered at Tick Canyon in southern California in 1868. It was named after Henry How (1828-1879), a Canadian mineralogist who first described it.
Howlite is typically white or grayish white with fine grey or black or brown veins, often in a web-like pattern. It is opaque with a sub-vitreous luster sometimes described as porcelaneous. It is usually found in borax deposits in the desert clays of California.
Lovely and unusual variety of stones. U.S. companies stick to the same old "regulars". Boring!
GemSelect also does a fine job of rating the stones. Gemstones are meant to dazzle and a great way to add flash and fun for those of us who like color. Will be happy to share photos of the stones when they are set.