Rare gemstones in Denver

Rare Gemstones In Denver

If you are looking for rare gemstones in Denver there is really only one place to call.  Kortz jewelers is a 4th generation family-owned jeweler and Bob Kortz has been in the jewelry business himself for decades.  You may remember our storefront on the a6th street mall with the famous Kortz clock.   If you are looking for rare gemstones in Denver Bob Kortz has the contacts to find exactly what you need at the best prices.  And he will make sure it is a quality stone!

Rare Gemstones In Denver

There are many gemstones rarer than dimaonds.  Alenadrite, tanzanite, black opals, Paraíba Tourmaline and Painite are all rarer than diamonds.  And when you are looking for these or other rare gemstones in Denver you have come to the right place. We can find you any rare gemstone and rare cuts of gemstones.  We can help you find the perfect loose gemstones. Or we can help you put those gemstones into a jewelry setting.   Kortz Jewelers is your personal jeweler.


Alexandrite is one of the rarest gemstones on Earth, It has been referred as an emerald by day and ruby at night. It can actually change color with light.  And it is truly a stunning stone. One of the hardest gemstones to find, if you are looking for this rare gemstone in Denver call Bob.  Let him know the shape and carat size you are looking for.

alexandrite stone in denver


Tanzanite are those gorgeous dark blue stones and can only be found in one place making them a rare gemstone. The name tanzanite was given because the world’s only known tanzanite deposit of importance is in northern Tanzania in Africa. The tanzanite mines are all located in an area of about eight square miles in the Merelani Hills, near the base of Mount Kilimanjaro and the city of Arusha.   Bob works with some of the top tanzanite dealers in the world and can procure your dream tanzanite stone at a great price.


tanzanite stone in denver

Black Opal

Australian black opals are the most valuable type of opal. Black opal is characterized by a dark body tone which can range from dark grey to jet black. . However, this refers only to the general body tone of the stone, and is not related to the rainbow or spectral colors present in the opal. Some people expect a black opal to be completely black.  But in those cases, they are actually worthless.  Let Bob help you find this rare gemstone in Denver.


black opal in denver

Paraíba Tourmaline

The brightly saturated blue-green hues of paraíba tourmaline stunned the gem world in the 1989. Its discovery in the Brazilian state of Paraíba spurred a rush of prospectors and miners into the area. The per carat price of these gems rose quickly and continues to grow. However, since the initial discovery, Brazil isn’t the only source of these gorgeous neon stones. You can also find these gems in Mozambique and Nigeria. Still, this tourmaline variety remains among the rarest gems.  And when you are looking for rare gemstones in Denver you need to call Bob Kortz.

paraiba tourmaline in denver


Painite is a very rare borate mineral. It was first found in Myanmar by British mineralogist and gem dealer Arthur C.D. Pain who misidentified it as ruby. It wasn’t until the 1950s that it was discovered as a new gemstone. And due to its rarity, painite can cost in the range of between US$50,000 to $60,000 per carat.  If you are looking for the rare painite in Denver Bob Kortz can help you find one.

painite in denver

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