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Sapphire is a typically blue gemstone most commonly used for jewelry. However due to it's remarkable hardness properties and it's resistance to radiation it is also used in scientific instruments small ball bearings and thin wafers used as insulating substrates for solid-state electronics.
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Iridescent gemstones exhibit lustrous rainbow-like colors that shimmer and change as they are tilted in the light and are one of nature's most impressive creations. Iridescence is a highly-prized gemstone optical phenomenon resulting from the way that light either interacts or interferes with the structural anatomy of a gemstone.
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The photo above is of a Songea sapphire I'll be cutting on this page. As you can see this stone is not quite round so we'll fix that by preforming it a bit. Here's a photo of my Facetron faceting machine. Not too hi-tech but very precise. Here's a close-up of the sapphire sitting on the diamond impregnated steel lap (or disc).
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The Element Six CVD Diamond Handbook 3 INTRODUCING DIAMOND Diamond is characterised by its exceptional hardness robustness and its optical and thermal properties; pre-eminent as a gemstone and an industrial tool. Natural diamond has an inherent variability and scarcity that limits its use in engineering applications. Developments
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Due to its optical properties YCZ (yttrium cubic zirconia) has been used for window lenses prisms filters and laser elements. Particularly in the chemical industry it is used as window material for the monitoring of corrosive liquids due to its chemical stability and mechanical toughness.
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If a window was to be made the spinning would continue expanding and further flattening the crown into a round disk suitable for glazing. Over centuries the name "crown glass" has remained even as the manufacturing methods evolved beyond the early hand techniques used in glass blowing.
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Nevertheless when applying highly-sensitive detection technique there is a high probability to observe weak emission from some apparently-transparent optical elements which still absorb light slightly in the UV–vis region and fluoresce in the detection window under blue laser excitation.
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Turquoise is an opaque blue-to-green mineral that is a hydrated phosphate of copper and aluminium with the chemical formula Cu Al 6 (PO 4) 4 8 ·4H 2 O.It is rare and valuable in finer grades and has been prized as a gemstone and ornamental stone for thousands of years owing to its unique hue. In recent times turquoise has been devalued like most other opaque gems by the introduction onto ...
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Single-molecule biophysics has transformed our understanding of biology but also of the physics of life. More exotic than simple soft matter biomatter lives far from thermal equilibrium covering multiple lengths from the nanoscale of single molecules to up to several orders of magnitude higher in cells tissues and organisms.
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Current capabilities and challenges for optical coherence tomography as a high impact non-destructive imaging modality. Adrian Bradu ... Comparison between a supercontinuum source and a titanium sapphire laser in achieving ultrahigh resolution spectral domain optical coherence tomography (SD-OCT)
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