11/23/2023 0 Comments Blue and yellow gemsWith that it allows them to show the sky blue it is known for. Therefore, to create pure blue hue, the majority of aquamarines in the market are exposed to heat treatment with the sole purpose of removing the green tint. Despite that, most natural aquamarines occur with a slight tint of green, due to different oxidation states of iron within the crystal lattice of the crystal. For aquamarine, its blue saturation largely lingers around the lower range of the colour tone, which contributes to its sky blue colour. Like all gems, the more trace elements, the more vivid the colour it gets. What causes aquamarine’s attractive colour is mainly due to the trace element of iron. Thought to be a gem created by the sea and carries the ability to calm oceans, it is now a popular gem choice for customised and sometimes high-end jewellery. Here are some sapphires from Montana, USA, rough and polished.ģ pieces of Kashmir sapphires with a total weight of 4.84 carats.Ī sky blue variety of the beryl mineral species, aquamarines are a lesser saturated blue gem that needs no introduction. Different localities may produce sapphire crystals of slightly different quality and size. Front row (left to right): Corundum from Sri Lanka, Tanzania. Here are some places where sapphires are most commonly found: Sri Lanka, Thailand, Myanmar, Kashmir (India), Madagascar, Australia, Montana (USA), Shandong (China), Pakistan, India, Ethiopia, Vietnam, Tanzania, Cambodia, Brazil, Kenya, Malawi, Nigeria, Rwanda, Zimbabwe, Finland (some star sapphires).īack row (left to right): Corundum from China, Madagascar, Myanmar. In spite of that, its blue comes in all tones and shades of blue from pale to dark, a more reason to be popular. It is this attribute that contributed to the highest price ever paid for a blue sapphire. no secondary colour) when viewed from the table. Royal Blue, sapphire’s top colour grade, is a uniform vivid blue colouration with no hue modifier (i.e. Furthermore, colour is sapphire’s strength. Extremely durable gemstone at a Mohs hardness of 9 with no cleavage (structural weakness) makes it a perfect gem for everyday wear. Sapphires are highly sought-after in the jewellery industry. Range of size of this set of blue sapphires is between 0.55ct and 1.71ct. From the lightest blue on top to the darkest blue at the bottom. This is an example of a heat treated sapphire that resulted in a beautiful blue colour which is very rare to find in nature.Ī range of blues in sapphire. In particular, sapphires found in the Kashmir region are famed for their vivid blue hue plus soft velvety appearance which is caused by extra fine rutile needles that scatter passing light without compromising their clarity. ![]() ![]() It is no wonder why sapphire had that kind of stature because very few gemstones are able to compete with its deep intense blue colour and transparency. ![]() Used on many occasions to symbolise royalty and wealth, it is a stone for kings and queens. small amounts of chromium - pink vanadium - purple green - iron (Fe 2+) and yellow - iron (Fe 3+).īlue sapphires are one of the highest prominence in our history. Sapphires come in different colours too and this is caused by different transitional trace elements, i.e. They are known for their intense blue caused by traces of iron and titanium in its atomic structure. ![]() Sapphires are made of aluminium oxide (Al 2O 3), and they are colourless when pure. They’re siblings! They both share prominent roles in gemstone history and industry. A surprising fact to many is that sapphires and rubies belong to the same corundum gem family.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |