Agate is a cryptocrystalline variety of silica, mainly chalcedony. Moh's Scale hardness 6.5 - 7, that forms in concentric layers in a remarkable variety of colours and textures. The crystals vary in clarity from opaque to translucent to transparent. Agate quartz was highly valued as a talisman or amulet during ancient times, and to this day, are still one of the most popular jewelry gemstones, often seen in accessories from rings to pendants, earrings and more."
"This coral is mined in the island of Indonesia. Where around 25,000,000 years ago was just an ocean! After all oceans and seas receded mother nature took over and performed her miracle which turned live coral into this wonderful agate that took the different colours of different minerals in the area."
Jasper is derived from the Greek for "spotted stone". Jasper is usually considered a chalcedony, but scientists put it in a group by itself because of its grainy structure. Finely grained dense jasper contains up to twenty percent foreign materials that determine its colour, streak and appearance. Uniform jasper is rare; it is usually multicoloured, striped, spotted or flamed.
The result of volcanic activity that ocurred millions of years ago! It's a form of pectolite which is quite common but none have the unique volcanic blue colouration of Larimar. The blue/green colour comes from traces of copper and calcium. A very rare mineral, it has only been found in the Dominican Republic. Discovered only in 1974, Larimar is hard to find outside of the Caribbean. By chemical composition, Larimar is a hydrated sodium calcium silicate with manganese, and has a hardness of 4.5 to 5 on the Moh's Scale.
Opal is defined as a mineral that is hydrated amorphous silica softer and less dense than quartz. It is typically and often marked with an iridescent play of colours. Opal's fire was long thought to be the result of iridescence. However, with the advent of scanning electron microscopes, we now know that it is a result of diffraction, and is known in the gem trade as play of colour. Opal is relatively soft, with a rating of 5.5-6.5 on the Moh's Scale.
It's not actually sponge but it's appearance is similar. Sponge coral is now undergoing farming techniques which is available in large quantities. Red sponge Coral is a type of coral that has an orange red colour, sponge coral is widely used in the jewellery industry and Asia exports to countries all over the world. Its hardness is 3.5 on the Moh's Scale.