Red River Sunset ~ Gemstone Donut Necklace ~ incl. 1.5mm leather cord in antique brown to knot for your desired length You will receive the donut shown Origin: Peru Polished: -Peru, in our production Size: -30mm - UFO shape (thicker in the middle - flatter outside) Grinding & polishing: -High gloss to 6000grit Why our products are special & by purchasing them we raise awareness of ethically pure crystals Highest quality & ethical mining This product comes from the most ethically sourced and highest quality production. We fight together for ethically correct minerals We support a company founded by a friend who worked for Greenpeace for 30 years and has now founded a company for clean mineral extraction. We do not sell cheap and unethical mass production from China & India In this world, many minerals are mined illegally, without protection, in a bloody, and corrupt manner. Conditions are often miserable from mining to polishing. There is widespread exploitation, and the profits often go to large corporations. Workers are poorly protected during mining, if it is even legal, and the pay is a sad joke. With the cooperation of our company in Peru, we ensure that we know: -Where our minerals come from, who mined them and under what conditions, who polished the product and how it was processed, that there is no long supply chain and that in the end we receive a specially tailored, high-quality product that is unique on the market. We hope you enjoy this product as it comes from ethically sourced production and the minerals were found and processed directly in Peru. About Red River Sunset from our partner: "In 2019, while testing new materials for our jewelry production, we came across this thin dendritic layer in a rock. Upon examining the rock and other samples from the surrounding area, we realized we had something extraordinary: A consistent pattern resembling a horizon of trees and bushes against white, snow-capped mountains under a blood-red sunset sky. We named it “Red River Sunset”® in honor of the unique red river near Cusco, Peru. But this stone had something even more exciting: Other dendritic stones exhibit irregular dendritic patterns that are difficult to predict, making it difficult to plan large-scale jewelry production based on such a material. Here, however, we have a vein running through the rock with a consistent color pattern. You can cut this vein, and slab after slab will display the same color pattern. This makes it possible to design large jewelry editions that contain individual, yet very similar, cabochons. Something we haven't seen before with dendritic stones. After testing this material in the lab, we now know that Red River Sunset® is a bicolored carbonate with a predominance of calcite. The red layer is richer in iron, although the highest percentage found in testing was only 0.89%. However, iron is a strong colorant. According to tests, this material is most likely travertine. Travertine is a form of terrestrial limestone that is deposited around mineral springs, particularly hot springs. Fresh travertine varies greatly in porosity, from approximately 10% to 70%. However, Red River Sunset® exhibits comparatively low porosity, suggesting it is a very old travertine. Such old travertines can have a porosity as low as 2% due to the crystallization of secondary calcite in the original pore spaces. It also indicates that this travertine was formed around a hot spring rather than a cold one. Finally, given that the material lacks magnesium, it is most likely that it was formed in freshwater rather than seawater. We hope you enjoy browsing our shop. If you like what you see, we would be very happy if you would follow us here :) "A stone is the condensed history of the universe" ~Art of Nature Berlin~