In the family of colored diamonds, blue diamonds, especially intensely colored blue diamonds, are rare and valuable. A chromogenic ion called boron is responsible for their “bluish” color.
In fact, in the gemstone world, besides blue diamonds, there are many other rare Treasures in gemstones that are even rarer and more beautiful. This is because of their special characteristics!
Let’s share them with you today!
Paraiba:
Paraiba tourmaline is the leading member of the tourmaline family, a rare gemstone sought after by jewelry collectors. While Paraiba tourmaline has a relatively large market share, there are very few good colors.
This beautiful color is thanks to the elements “copper” and “manganese”, which give Paraiba tourmaline its unique color.
It was discovered in Brazil in 1987 and named after Paraba state where it originated. The copper component in Paraiba tourmaline gives Paraiba tourmaline its brilliant and unique blue-green hue, known as “electric blue” or “neon blue”.
Around 2000, tourmalines with similar colors to Brazilian Paraiba were discovered in Nigeria and Mozambique. The grains of African Paraiba tourmaline are larger than those of Brazilian Paraiba tourmaline.
However, no matter where tourmaline comes from, it is usually impossible to distinguish its origin with the naked eye and conventional tests. As long as it is colored by copper and manganese elements, it can be called “Paraiba”.
Vanadium emerald:
“The addition of vanadium and chromium gives vanadium chrysoberyl a distinctive minty green hue. This makes it quite different from the common yellowish-green chrysoberyl colored by iron.
Vanadium emeralds are mostly mint green color.
Vanadium emeralds were first discovered in Tanzania in the mid 1990’s, and have since been found in Llakaka, Madagascar, Sri Lanka, and the Magdalene Valley of Burma.
Because of its beautiful color, scarcity, and hardness, vanadium emeralds continue to command high prices.
Cobalt Spinel:
Among the many blue gemstones, Cobalt spinel is the brightest and solemn blue gemstone in the sapphire family, in addition to sapphires’ “royal blue” and “cornflower”.
The top color is bright cobalt spinel, also known as the spinel family of “blue siren”. This is all due to the element cobalt. There are many blue spinels, but most are iron and zinc colored, and their colors are not so bright.
These blue crystals oscillate between gray-blue and blue-black in color, are off-color and dull, and are “a little bit off” any way you look at them.
The ratio of iron to cobalt must be strictly distributed within a certain range to form a flawless cobalt spinel without gray tones.
