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Calcite (Calcium Carbonate) variant iceland spar
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Calcite (Calcium Carbonate) variant iceland spar
A cleaved rhomb of iceland spar showing double refraction from near Eskifjordr, Iceland
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Media ID 8601033
© Mary Evans Picture Library 2015 - https://copyrighthub.org/s0/hub1/creation/maryevans/MaryEvansPictureID/10703639
Calcareous Calcite Calcite Group Calcium Calcium Carbonate Carbonate Carbonate Mineral Iceland Mineral Refraction Spar Specimen Variant
EDITORS COMMENTS
1. Title: Iceland Spar: A Stunning Calcite Variant Showcasing Double Refraction from Iceland 2. Description: This photograph captures a pristine calcite variant, famously known as Iceland spar, displaying its unique double refraction properties. The mineral specimen, sourced from the enchanting landscapes of near Eskifjordr, Iceland, is presented in a studio setting, allowing for a clear and unobstructed view of its intricate crystalline structure. 3. Background: Calcite, a common carbonate mineral belonging to the calcite group, is the primary component of limestone and marble. This versatile mineral comes in a wide range of forms and colors, but the Iceland spar variant is particularly noteworthy due to its distinctive double refraction. 4. Double Refraction: Double refraction is a phenomenon where light passing through the mineral splits into two rays due to the anisotropic nature of the crystal. In the case of Iceland spar, this results in the crystal appearing to have two distinct images when viewed from different angles. This property has made Iceland spar a subject of fascination for scientists and collectors alike. 5. Origin and Significance: Iceland spar was first discovered in Iceland in the late 17th century, and its unique double refraction property was later explained by the renowned Danish physicist, Rasmus Bartholin, in 1669. Since then, Iceland spar has been a source of inspiration for various scientific discoveries and applications, including the development of polarizing filters and the study of anisotropic materials. 6. Conclusion: This photograph of an exquisitely cleaved rhomb of Iceland spar serves as a testament to the beauty and intrigue of the natural world. The double refraction property of this calcite variant not only makes it a valuable addition to any mineral collection but also a captivating reminder of the wonders that lie hidden within the Earth's crust.
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