Exploring the allure of Dioptase in the Gem-A Gemstone & Mineral Collection
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In the heart of the Urals region of Kazakhstan, a captivating gemstone was first discovered in the late 18th century. This gem, known as Dioptase, was initially mistaken for emerald by copper miners due to its striking green colour [2][3][4].
Dioptase, a copper cyclosilicate mineral, exhibits a deep emerald to bluish-green hue that closely resembles emerald's appearance. However, over time, distinct differences in crystal structure and mineralogy became clear, distinguishing Dioptase from emerald [2][4].
This fascinating gemstone forms in usually small prismatic rhombohedral crystals, hexagonal in section, with a rhombohedral pyramid termination [1]. Large crystals of Dioptase are rare, but when found, they showcase a stunning display of their hexagonal sections.
The spectrum of Dioptase shows strong absorption of violet and blue light and a weaker absorption band in the orange to red [1]. This unique absorption pattern gives Dioptase its vibrant green colour, setting it apart from other gemstones.
Dioptase has a high birefringence of 0.051 to 0.053, which contributes to its brilliant display of colours under different lighting conditions [1]. Incipient cleavages in Dioptase can cause interference colors to be seen inside the gem, adding another layer of intrigue to its beauty.
Dioptase is pyroelectric, meaning it can become electrically polarized and generate a temporary voltage [1]. This property, along with its unique crystal structure, makes Dioptase a fascinating subject for study in the field of mineralogy.
Dioptase is found in good quality crystals in few localities, most notably Kazakhstan, Africa, the USA, Chile, and Peru [5]. However, due to its brittle nature and difficulty in faceting, Dioptase is rarely set in jewellery.
Despite its rarity and challenges in faceting, Dioptase has a rich history. It was named by René Just Haüy in 1797, who derived the name from the ancient Greek words "dia" (through) and "optasia" (vision) [6]. Dioptase has also been used as a pigment in painting, with its use dating back to Neolithic times [7].
Dioptase requires warm and dry conditions for formation, and is mined in arid places [8]. It crystallizes in the trigonal system and has a specific gravity of 3.28 to 3.35 [1]. With a hardness of 5 on Mohs' scale of hardness [1], Dioptase is slightly softer than emerald but still offers a durable gemstone option.
In conclusion, Dioptase is a rare and fascinating gemstone with a rich history and unique properties. Its discovery in Kazakhstan and initial misidentification as emerald adds an interesting twist to its story, making it a captivating subject for gemstone enthusiasts and mineralogists alike.
References: [1] https://www.mindat.org/min-10737.html [2] https://www.gemdat.org/gems-gemology/id-1964 [3] https://www.britannica.com/science/dioptase [4] https://geology.com/minerals/dioptase/ [5] https://www.gemstone.org/gems/dioptase.html [6] https://www.mindat.org/min-10737.html [7] https://www.jewelry.com/gemstones/dioptase/ [8] https://www.gemdat.org/gems-gemology/id-1964
- Exploring the world of education and self-development, one may encounter courses dedicated to the study of gemmology, where Dioptase is highlight as a captivating subject due to its unique properties and rich history.
- For those interested in science and technology, publications about space and astronomy might discuss the potential applications of Dioptase's pyroelectric properties in the field of research and space exploration.
- In lifestyle magazines, articles tackling medical-conditions might suggest incorporating Dioptase into healing practices, as this gemstone has been used as a pigment in painting as far back as Neolithic times.
- Workshops focused on art and design can provide opportunities for individuals to create unique pieces using Dioptase, showcasing its stunning display of colours under different lighting conditions.
- In the realm of formal education, university programs in the fields of science and mineralogy might conduct research on Dioptase, aiming to better understand its crystal structure, mineralogy, and the implications of its rarity on the gemstone market.
