16.5mm Blue CHALCEDONY round cabochon Duck Egg blue AAA 16.5 by 7.5mm appro

  • Shangrilagems is currently on holidays and may take longer than normal to respond.

Item Information

Dimensions (mm) 16.5 x 165 x 7.5mm
Weight (carats) 11 carats
No Treatment


 ‘The Best Gems on the Web!’

 Gem-A Corporate Member

Chalcedony became very popular in jewellery in the post art deco period of the 1930’s to the 1960’s. Some beautiful jewellery designs with gem grade blue purple chalcedony, can be seen in museums and exhibitions.   

Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of the minerals quartz and moganite. These are both silica minerals, but the difference is that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony’s standard formula is SiO2 (silicon dioxide).

 Chalcedony has a waxy luster; it may be semi transparent or translucent. It comes in a large range of colors with the most valuable and sought after being a shade of purplish blue or ‘duck egg blue’as some people call it.  But those most commonly seen are white to gray, gray-blue or a shade of brown ranging from pale to nearly black.

  The quality of the Blue Chalcedony is judged by the depth of blue color in the stone. The color of the gemstone also depends on the place of its origin, for example the Blue Chalcedony from California and Nevada is moderately grayish blue. Blue Chalcedony from Namibia is called African Blue. Strong color saturation and high degree of translucency are the other factors that determine the price of the stone.

 Blue Chalcedony also comes from Turkey, Indonesia, and the West Indies.

Healing Properties of Chalcedony

 Chalcedony promotes humanity, togetherness and good will.  It absorbs negative energy.  It brings the mind, body and spirit together.  Chalcedony encourages benevolence and generosity; it alleviates hostility and transforms melancholy into joy.  Chalcedony eases low self-esteem. Chalcedony lessens the effects of dementia and senility and increases both physical and mental energy. It heals the eyes, gallbladder, bones, spleen, blood and circulatory system.  Blue Chalcedony, specifically is a throat chakra stone.  It promotes mental flexibility and verbal fluency.  It stimulates the ability to learn new languages and improves memory. It enhances the immune system. Blue Chalcedony lowers temperature and blood pressure. It heals the lungs of the effects of smoking.



$70.00 USD

Add to Cart Make an Offer
Shipping $14.95
7 Days via Registered Shipping
Add to Watch List Ask a Question * All prices in USD

Audit Information

The Gemstone Sheriff program allows our members to request an audit on any auction, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.

Pricing & Details

Auction ID 907288
Watchers 17 watching
Viewed 1,487 times
Starts 28th Mar 2019 3:01pm PDT

Shipping & Insurance

Provider Shipping Transit
Registered Shipping $14.95 7 days
Standard Shipping - Tracked $14.95 7 days
Shipping Insurance all providers $4.00 (optional)

You May Also Like