|Dimensions (mm)||not provided|
|Weight (carats)||not provided|
GEODE WITH TITANIUM
This is a natural geode specimen from mexico that has been treated with titanium to give a stunning colour display.The geode has been cut in half and not polished.
Weight cts app
size 24 x 19 x 8 mm app
GEODES ARE ESSENTIALLY ROCK CAVITIES OR VUGS WITH INTERNAL CRYSTAL FORAMTIONS OR CONCENTRIC BANDING. THIS SPECIMEN WAS MINED AT ZACATECAS MEXICO. THE EXTERIOR OF THE MOST COMMON GEODES IS GENERALLY LIMESTONE OR A RELATED ROCK, WHILE THE INTERIOR CONTAINS QUARTZ CRYSTALS AND/OR CHALCEDONY DEPOSITS. OTHER GEODES ARE COMPLETELY FILLED WITH CRYSTAL, BEING SOLID ALL THE WAY THROUGH. THESE TYPES OF GEODES ARE CALLED NODULES. THIS SPECIMEN SHOWS GREAT FORMATIONS AND THE SURFACE IS POLISHED.
TITANIUM [TiN]The hardness of TiN coatings is difficult to measure as the coatings are exceptionally hard and the thinness of the coating causes conventional hardness tests to penetrate into the substrate. Nanoindentation hardness tests are required for accurate readings. The hardness of TiN is estimated as ~85 on the Rockwell C Hardness (~2500 Vickers Hardness or 24.5 gigapascal). The Rockwell C scale is regarded as crude for readings this high. Special techniques have been developed to measure TiN hardness.
TiN has excellent infrared (IR) reflectivity properties, reflecting in a spectrum similar to elemental gold (Au). Depending on the substrate material and surface finish, TiN will have a coefficient of friction ranging from 0.4 to 0.9 versus itself (non-lubricated). Typical formation has a crystal structure of NaCl-type
|Starts||16th Jan 2017 10:02pm PST|
|Ends||19th Jan 2017 10:00pm PST|
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