Colored Gemstones

When choosing gemstones for your jewelry project, in addition to color, it is helpful to consider the gem's Mohs rating. The Mohs scale of mineral hardness is used to determine a stone's hardness and scratch resistance. This scale ranks stones from a 1 - 10, with diamonds considered the hardest on the scale at a 10 and softer stones like opals considered a 5.5 - 6.5. At Takayas Custom Jewelry, we are happy to offer an assortment of precious and semi-precious stone options. Below each stone's description are the color varieties it is available in.


Sapphires are a popular deep blue gem from the mineral family corundum. At a Mohs’ hardness rating of 9, sapphires are second in hardness only to diamonds, which makes them ideal for wedding jewelry. Sapphires also come in a variety of other color options including white, pink, orange, and yellow.


Like sapphires, rubies are from the same mineral family of corundum, and they have a Mohs’ hardness rating of 9. Rubies are known for their lovely crimson color, and their durability makes them a great red gem choice.


Emeralds are the most valuable form of the mineral beryl. They are known for their vivid forest green color. Although emeralds are a very hard gem, rating a 7.5 - 8 on the Mohs' scale, they can also sometimes be brittle.


Alexandrites are a rare, color-changing variety of the mineral chrysoberyl that can appear bluish-green in natural and fluorescent light to brownish or purple-red in incandescent light. They rate an 8.5 on the Moh's scale. Because naturally mined alexandrites are incredibly rare, lab-grown alexandrites are a popular choice because of their availability and significantly less expensive price point.