AMETHYST, CALCITE, QUARTZ, COPPER MINERALS, Minas Gerais Brazil (cabinet)
AMETHYST, CALCITE, QUARTZ, COPPER MINERALS, Minas Gerais Brazil (cabinet)
Amethyst is a purple variant of quartz (SiO2), with its distinctive violet hue attributed to factors such as irradiation, iron (Fe3+) impurities, and occasionally other transition metals, along with various trace elements that lead to intricate substitutions within its crystal lattice. The irradiation process causes Fe3+ ions, which substitute for silicon in the lattice, to lose an electron, creating a [FeO4]0 color center. Structurally, amethyst consists of a three-dimensional network of tetrahedra, where silicon atoms are centrally located and surrounded by four oxygen atoms at the tetrahedron's vertices. This rigid structure contributes to the mineral's hardness and durability, making it an ideal choice for jewelry applications.
This specimen is a true wonder and offers heaps to enjoy perfect calcite crystals, quartz, copper minerals (take your microscope out).
Shipping & Returns
We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.
We want every customer to have a great experience shopping with us. If for any reason you’re not completely satisfied with your purchase, please reach out to our team — we’re here to help and will review every return request with care.
If your item arrives damaged, we kindly ask that you provide a short, continuous video showing the specimen from at least six angles. You can simply hold it in your hands and gently rotate it while filming. Please also include a clear view of the package label in the video so we can assist you as quickly as possible.
For all items reported as damaged or broken, we do require the item to be returned to us before a refund can be processed.
Return shipping costs are initially the responsibility of the customer. However, if your claim is approved after review, we will reimburse your reasonable return postage costs.
Our T&C's or policies prevail in case of a disagreement.
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