Blue Aventurine

Emerald is one of the most well-known gemstones and commonly used for jewelry and other ornamental decoration. Emerald is graded on a scale of hue, tonal grade, and saturation. In general, a high-grade emerald will be medium to very dark in coloring. Most marketed gemstones are Colombian and have a blue-green color.

Diorite rock has a contrasting mix of black and white mineral grains. The most famous diorite sculpture is the Code of Hammurabi, a black pillar inscribed with Babylonian laws. Diorite accepts a bright polish and can be attractive as a gemstone. It is used in the construction of roads and buildings and is cut and polished for building facings.

Not to be confused with other onyx-colored gems, black Tourmaline is packed full of useful elements, making it so much more than a pretty rock. Although it is high in lithium, aluminum, and iron, it is still most commonly used as a semi-precious gemstone and isn't mined for industrial purposes.

Chrysocolla is a beautiful, highly prized gemstone often used in silversmithing and goldsmithing. It is generally blue-green in color and similar to turquoise, but it's more widely available and relatively easy to work and shape. This mineral is frequently intergrown with other minerals such as Quartz, Chalcedony, and Opal, and is found in copper deposits.

A copper carbonate hydroxide mineral, malachite is well-known for its distinctive green shading, which renders it an attractive carving material. It has been mined in modern-day Great Britain and Israel for over three thousand years. Until 1800, it was used as a pigment in green paints.

Shungite, originally coined in 1879, referred to a black, lustrous mineraloid with more than 98% carbon. In recent times, the term has expanded to include a metamorphosed Precambrian algal-derived oil shale or sapropelite containing more than 5% carbon. These two forms of shungite are primarily found in the Karelia region of Russia. Shungite with over 98% carbon, also known as Elite Noble shungite, makes up less than 1% of the shungite bounty, standing out with its remarkably shiny and smooth surface, deviating from the usual rough texture observed in other shungite.

Moldavite is a natural glass that was formed as a result of a meteorite impact that occurred 15 million years ago in Europe. Being very rare and difficult to mine, moldavite is very valuable and extremely prized among collectors. Fragile just like any glass, it's commonly used with jewelry that doesn't face potential impact.

The small red spots of Jasper embedded in bloodstone resembles tiny drops of blood, hence the name. Bloodstone is actually a variety of Chalcedony. As a birthstone, it is associated with the month of March. It is polished into cabochons and used in rings and amulets, or carved into ornamental objects.