Movatterモバイル変換

“Cubes to ~ 1/5 mm. Found 1993.This is the old parent photo:Very tiny but very beautiful golden yellow fluorite cubes (some with edge modifications). It fluoresces intense pale blue SW. (But see the more detailed description in the new parent photo.)”

“Cubes to ~ 1/5 mm. This is a stereo child photo.”

“FOV 3.7 x 2.3 mm. This is a comparison of SW UV fluorescence and visible light images.Dec 2022: I have decided to make this vertical format comparison photo a child photo. The new parent photo uses the Mindat interactive comparison tool with the same images. There are pros and cons with both methods of comparison. For the time being, I am keeping them both.April 2022: This is a new parent photo. All previous images and descriptions have been retained as child images.This new image was posted because with my new SW UV LED “flashlight”, it became possible to photograph the fluorescence. This was not possible with my old tube unit because its bulk prevented placing it close enough to the specimen without blocking the camera’s and/or scope’s view. (The flashlight’s more concentrated beam also helps.)In visible light, some of the fluorite crystals have a beautiful, gemmy, yellow color - very unusual for Sterling Hill. But the crystals are very small, and the yellow ones do not cover large areas. So this color can only be seen under a scope. Hand-held, the SW UV response appears to be intense pale blue, with a prolonged phosphorescence. But that’s because most of the fluorite is colorless and has that fluorescence. They show up quite well in the UV photo, but are almost invisible in the visible light photo. The “golden” crystals show up well in both images, but their fluorescent response is sort of greenish-yellow – not pale blue. The red fluorescing area is calcite. Its presence indicates that this specimen was originally in or very near the ore-body.I have also posted stereo pairs of both the UV and visible light images, as well as another UV vs visible light comparison of a slightly different part of the specimen.”

“FOV 2.3 x 3.7 mm. This is a (stacked, micro) SW UV fluorescence stereo pair.”

“FOV 2.3 x 3.7 mm. This is a (stacked, micro) visible light stereo pair.”

“FOV 2.2 x 3.6 mm. This is comparison of SW UV fluorescence and visible light images of a different part of the specimen.”

“This is a comparison of SW UV fluorescence and visible light images.Update Dec 2022: This is another new parent photo using the Mindat interactive comparison tool with the same images as before. (To see both images, click on the TN.) The previous "vertical" comparison is now a child photo. Both versions use the same text.April 2022: This is a new parent photo. All previous images and descriptions have been retained as child images.This new image was posted because with my new SW UV LED “flashlight”, it became possible to photograph the fluorescence. This was not possible with my old tube unit because its bulk prevented placing it close enough to the specimen without blocking the camera’s and/or scope’s view. (The flashlight’s more concentrated beam also helps.)In visible light, some of the fluorite crystals have a beautiful, gemmy, yellow color - very unusual for Sterling Hill. But the crystals are very small, and the yellow ones do not cover large areas. So this color can only be seen under a scope. Hand-held, the SW UV response appears to be intense pale blue, with a prolonged phosphorescence. But that’s because most of the fluorite is colorless and has that fluorescence. They show up quite well in the UV photo, but are almost invisible in the visible light photo. The “golden” crystals show up well in both images, but their fluorescent response is sort of greenish-yellow – not pale blue. The red fluorescing area is calcite. Its presence indicates that this specimen was originally in or very near the ore-body.I have also posted stereo pairs of both the UV and visible light images, as well as another UV vs visible light comparison of a slightly different part of the specimen.”

“FOV 2.3 x 3.7 mm. This is a comparison of SW UV fluorescence and visible light images using the Mindat interactive comparison tool. It uses the same images as the parent image, so it may seem redundant. But both posts are needed in order for the tool to work.This new image was posted because with my new SW UV LED “flashlight”, it became possible to photograph the fluorescence. This was not possible with my old tube unit because its bulk prevented placing it close enough to the specimen without blocking the camera’s and/or scope’s view. (The flashlight’s more concentrated beam also helps.)In visible light, some of the fluorite crystals have a beautiful, gemmy, yellow color - very unusual for Sterling Hill. But the crystals are very small, and the yellow ones do not cover large areas. So this color can only be seen under a scope. Hand-held, the SW UV response appears to be intense pale blue, with a prolonged phosphorescence. But that’s because most of the fluorite is colorless and has that fluorescence. They show up quite well in the UV photo, but are almost invisible in the visible light photo. The “golden” crystals show up well in both images, but their fluorescent response is sort of greenish-yellow – not pale blue. The red fluorescing area is calcite. Its presence indicates that this specimen was originally in or very near the ore-body.I have also posted stereo pairs of both the UV and visible light images, as well as another UV vs visible light comparison of a slightly different part of the specimen.”