Big Old Chunky Ellensburg Blue Old Stock agate
US$2,750
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100% certified. And as you can see her little pink hues on a winter 🥶 blustery day. Each Ellensburg to be considered for jewelry or even looked at follows a fingerprint process.
Ellensburg Blues are a locally sourced blue quartz that retail for a higher price than blue quartz samples from other localities. We hypothesize that Ellensburg Blue samples have a distinct trace element fingerprint in comparison to blue quartz samples collected from other locations, such as Holley blue agates from Oregon. To test this hypothesis, multiple samples from known locations were analyzed using the Murdock Research Laboratories portable X-ray fluorescence spectrometer (pXRF). The data was plotted based on its chemical composition, so similarities/differences between the samples could be identified. The Ellensburg blue samples have a distinct trace element composition with a spike in zirconium corresponding with the resulting blue color. The known locality samples were used to create ratios between various important trace elements to produce statistical relationships and develop the sourcing key for blue quartz samples. To test the key, we ran all of the samples from known locations and checked for a correlation i.e. an Ellensburg Blue was labelled as an Ellensburg Blue by the PINK.
PINK ...... not gray.... not solidl
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