March 2023

Crystals, Opals

Exploring the Beauty and Properties of Spencer Opal: Mining, Types, and Identification

Posted on March 4, 2023March 3, 2023 by miamimining

04
Mar

Spencer Opal is a highly prized gemstone among crystal collectors due to its unique properties and stunning appearance. In this article, we will delve into the mining process, types, properties, and identification of Spencer Opal, as well as its use in jewelry.

Spencer Opal Mining

Spencer Opal is mined from the Opal Queen Mine in Spencer, Idaho. The mine is located in the southeastern part of the state and is known for producing high-quality opals. The mining process involves digging tunnels and drilling into the rock to extract the opal-bearing layers. The opals are then carefully extracted, sorted, and graded for quality.

Spencer Opal Properties

Spencer Opal is a type of precious opal that displays a play of color when viewed from different angles. The opal has a hardness of 5.5-6.5 on the Mohs scale and a specific gravity of 1.9-2.2. It has a vitreous to waxy luster and can range in color from white to pink, blue, green, and yellow. The opal’s play of color is due to the presence of silica spheres that diffract light, creating a range of colors.

Spencer Opal Types

There are several types of Spencer Opal, including white opal, pink opal, blue opal, and dendritic opal. White Spencer Opal is the most common and has a white to cream color with a play of color ranging from blue to green. Pink Spencer Opal has a pinkish hue with a play of color that ranges from pink to orange. Blue Spencer Opal has a blue to bluish-green color with a play of color that ranges from blue to green. Dendritic Spencer Opal has a white to cream color with black dendrite patterns.

How to Identify Spencer Opal

Identifying Spencer Opal can be challenging due to the many types and variations. However, there are some key features to look for, such as its play of color, hardness, and specific gravity. Spencer Opal also has a distinctive conchoidal fracture and can be identified by its waxy to vitreous luster. Additionally, it is important to note that Spencer Opal should not be confused with common opal, which does not display a play of color.

Spencer Opal Jewelry

Spencer Opal is a popular choice for jewelry due to its unique appearance and properties. The opal is often cut into cabochons, which are then set into pendants, earrings, and rings. The opal’s play of color makes it a versatile gemstone that can be paired with a variety of metals and settings. Spencer Opal jewelry is not only beautiful but also a great investment for collectors.

Conclusion

Spencer Opal is a stunning gemstone that is highly prized by crystal collectors and jewelry enthusiasts alike. The opal’s unique properties and play of color make it a one-of-a-kind gemstone that is a must-have for any collection. Whether you are a collector or simply appreciate its beauty, Spencer Opal is a gemstone that is sure to impress. From mining to identification and jewelry, Spencer Opal is a gemstone that is worth exploring.

Crystals

Collecting Rare Molybdenum Minerals: Specimens, Crystal Forms, and Identification

Posted on March 4, 2023March 3, 2023 by miamimining

04
Mar

Mineral collectors are always on the lookout for rare and unique specimens to add to their collections. One such group of minerals that have caught the attention of collectors is molybdenum minerals. In this article, we will explore rare molybdenum minerals, their crystal forms, where to find them, and how to identify them.

Molybdenum Minerals for Collecting

Molybdenum minerals are not commonly collected by mineral enthusiasts, which makes them a unique addition to any collection. The most commonly collected molybdenum minerals are molybdenite, powellite, and wulfenite. However, there are several other rare molybdenum minerals that are sought after by collectors.

Rare Molybdenum Minerals

Some of the rare molybdenum minerals that are highly sought after by collectors include ferrimolybdite, molybdofornacite, and molybdophyllite. Ferrimolybdite is a yellow to orange mineral that is found in oxidized molybdenum deposits. Molybdofornacite is a greenish-blue mineral that is found in hydrothermal veins, while molybdophyllite is a white to pale blue mineral that is found in copper deposits.

Molybdenum Mineral Specimens

Molybdenum mineral specimens are typically found in the form of crystals, which can range in size from tiny to several centimeters in length. Molybdenite, for example, forms in thin, flexible sheets that can be peeled apart, while wulfenite forms in bright orange to yellow tabular crystals. Powellite, on the other hand, forms in yellow to greenish-yellow crystals that are often found as aggregates.

Molybdenum Crystal Forms

Molybdenum minerals can form in a variety of crystal forms, including hexagonal, tetragonal, and orthorhombic. Molybdenite, for example, forms in hexagonal crystals, while powellite forms in tetragonal crystals. Wulfenite forms in a distorted tetragonal crystal system, and molybdophyllite forms in orthorhombic crystals.

How to Identify Molybdenum Minerals

Identifying molybdenum minerals can be challenging, as they often occur as secondary minerals in oxidized deposits. Molybdenite, for example, can be easily identified by its metallic luster and cleavage sheets, while wulfenite can be identified by its bright orange-to-yellow color and tabular crystal habit. Powellite can be identified by its fluorescence under ultraviolet light, while molybdofornacite can be identified by its greenish-blue color and association with other copper minerals.

Conclusion

Molybdenum minerals offer a unique opportunity for mineral collectors to add rare and unique specimens to their collections. The most commonly collected molybdenum minerals are molybdenite, powellite, and wulfenite, while rare molybdenum minerals such as ferrimolybdite, molybdofornacite, and molybdophyllite are highly sought after by collectors. Molybdenum minerals form in a variety of crystal forms and can be identified by their unique properties and associations with other minerals.

Fossils

Trilobite Fossils: Discovering Their Value, Locations, and How to Clean Them

Posted on March 3, 2023March 3, 2023 by miamimining

03
Mar

Trilobite fossils are fascinating relics of the ancient world that captivate the imagination of scientists and collectors alike. These creatures lived millions of years ago and left behind intricate fossils that provide us with a glimpse of what life was like during that time. In this article, we will explore the value of trilobite fossils, where to find them, how to identify them, and how to clean them.

Trilobite fossils for sale

Trilobite fossils are highly sought after by collectors around the world, and they can often be found for sale online or in specialty stores. When looking to purchase a trilobite fossil, it’s important to verify its authenticity and quality. One way to do this is to look for a reputable dealer who can provide documentation of the fossil’s origin and history.

Trilobite fossil locations

Trilobite fossils can be found all over the world, but some locations are more famous than others. One of the most famous trilobite fossil locations is the Burgess Shale in Canada, where exceptionally preserved fossils can be found. Other popular trilobite fossil locations include Morocco, the United States, and the Czech Republic. It’s important to research the laws and regulations surrounding fossil collecting in these areas before embarking on a fossil-hunting trip.

Trilobite fossil identification

Identifying a trilobite fossil can be a challenging task, but there are several key features to look for. Trilobites have a distinctive three-lobed body, which gives them their name. They also have a hard exoskeleton and multiple segments. When identifying a trilobite fossil, it’s important to look for these features and compare them to known trilobite species.

Trilobite fossil value

The value of a trilobite fossil can vary greatly depending on several factors, such as the rarity of the species, the quality of the fossil, and its size. Some trilobite fossils have sold for thousands of dollars at auction, while others may be more affordable. It’s important to research the market value of trilobite fossils before making a purchase or selling a collection.

How to clean trilobite fossils

Cleaning a trilobite fossil is an important step in preparing it for display or scientific study. However, it’s important to be careful when cleaning fossils, as they can be fragile and easily damaged. One common method of cleaning trilobite fossils is to use a soft-bristled brush and water to gently remove dirt and debris. It’s important to avoid using harsh chemicals or abrasive tools, as these can damage the fossil.

Conclusion

Trilobite fossils are incredible relics of the past that provide us with a glimpse of ancient life. Whether you’re a collector or a scientist, these fossils offer a unique opportunity to explore the natural world and uncover its secrets. By understanding the value of trilobite fossils, where to find them, how to identify them, and how to clean them, you can gain a deeper appreciation for these fascinating creatures and the world they lived in.

Crystals

Discovering the Beauty and Significance of Florida’s Agatized Coral

Posted on March 3, 2023 by miamimining

03
Mar

Florida is famous for its beautiful beaches, sunny weather, and diverse wildlife, but not many people know that the state is also home to a unique natural wonder: agatized coral. This stunning fossilized coral is found only in a few locations in Florida, making it a rare and valuable gemstone for rock enthusiasts and collectors around the world.

Agatized coral is a type of chalcedony, a mineral that is formed from silica-rich fluids that seep into porous rocks and fill in their cavities. Over time, the silica crystals form intricate patterns and layers that give the stone its distinctive appearance. In the case of agatized coral, the original coral skeleton is replaced by chalcedony, preserving the delicate details of the coral structure while transforming it into a hard and durable gemstone.

The process of agatization is a slow and complex one, taking millions of years to complete. It starts with the death of the coral colony, which sinks to the ocean floor and becomes buried in sediment. As the coral decomposes, the space left behind is filled with groundwater rich in dissolved silica, which gradually replaces the original coral material. The silica is then slowly crystallized over time, forming the intricate patterns and colors that make agatized coral so prized.

The best-known location for agatized coral in Florida is the Peace River region, which is located in the central part of the state. This area is famous for its rich deposits of fossilized marine life, including shark teeth, shells, and coral. The agatized coral found in the Peace River is typically a mix of red, pink, and white colors, with intricate patterns and textures that make each stone unique.

Another location for agatized coral in Florida is the Tampa Bay area, where the stone is found in the form of geodes. Geodes are hollow rocks that contain a crystal-lined cavity, and in the case of agatized coral, the cavity is lined with colorful chalcedony that has replaced the original coral material. These geodes are prized by collectors for their unique and beautiful patterns, and they can be cut and polished to reveal their hidden beauty.

Agatized coral is not only prized for its beauty, but it also has a rich cultural and historical significance. In ancient times, coral was believed to have healing properties and was used in medicine and jewelry-making. The Maya civilization, for example, used coral in their artwork and jewelry, and they believed it had mystical properties that could ward off evil spirits and protect the wearer.

Today, agatized coral is still used in jewelry-making, as well as in decorative objects such as bookends, paperweights, and sculptures. Its unique patterns and colors make it a sought-after gemstone, and its rarity and historical significance only add to its value.

In conclusion, Florida’s agatized coral is a fascinating and beautiful natural wonder that is well worth exploring for rock enthusiasts and collectors. Its intricate patterns, rich colors, and cultural significance make it a unique and valuable gemstone that is sure to captivate anyone who appreciates the beauty and wonder of the natural world.