40 mm 450 Ct Unheated Rutilated Quartz Sphere (Brazil)

Item Information

Dimensions (mm) 41 x 41 x 41mm
Weight (carats) 450 carats



Species: Quartz

Dimensions(mm): 41 x 41 x 41

Treatment: Unheated & Untreated. Guaranteed. 

Origin: Brazil

4 C’s 

Carat weight: 450 

Color: Colorless with gray and brownish golden inclusions 

Cut: Polished Sphere

Clarity: Translucent/Semi-transparent


Available at cost.

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cor gems




Guaranteed Customer Satisfaction

We have a 100% feedback score after over 100 transactions for one reason - we care! We work hard to deliver the best gems, so it’s only fitting that we compliment the best gems with the best service.

We are obsessed with making our customers happy. Should you encounter any issues whatsoever, please send us a message. Response time is generally under 12 hours.

We’re not happy unless you’re happy!


$9.99 - Standard airmail shipping. Shipping time varies from as little as 2 days up to a few weeks.  

Upgraded shipping services are available; contact us for details.

Orders over $2,000 receive complimentary White Glove service - express shipping to virtually anywhere in the world. 100% tracked & Insured. Direct signature required for additional security.*

*Restrictions apply. Contact us for details.


No hassle 30-day returns. 100% money back guarantee. No restocking fee.


All of our diamonds are Kimberly compliant. We deal only with registered business and ensure that all of our suppliers comply with the International Labour Organization’s labour standards.

Pictures & Videos

We do our best to portray gemstones as accurately as possible. Our goal is that customers are shocked by how much better their purchases look in real life as compared to the pictures and videos.

Monitors and phone screen vary greatly, so please try to view our pictures and videos on more than one device if possible. Further, gemstone appearance can vary greatly depending on the lighting and background.

 We are happy to provide supplementary pictures and videos; just ask!


What is cor gems?

Cor Gems is a gemstone dealer headquartered in Whitby, Canada. We specialize in Paraiba tourmaline and red spinel. We also have operations in Thailand.  We started by supplying jewelry manufacturers with loose gemstones and diamonds. We expanded into doing custom orders for clients and are currently focusing on bringing our superior customer service to the world of e-commerce.

Our logo is stylized as cor gems; it’s entirely lowercase because we believe in no-frills simplicity. Buying a gemstone should be an easy process, and cor gems strives to achieve just that with superlative quality gems, industry-best prices, and unparalleled customer service.

How are our cor gems’ prices so low?

We achieve our industry-best prices by sourcing directly from miners and cutters. In addition to delivering value to our customers, eliminating business intermediaries in this manner allows us to provide our suppliers with fair compensation.

Does cor gems take custom orders?

Yes! We specialize in making our customers’ dreams come true. We can source virtually any gemstone from Argyle pink diamonds to pigeon’s blood red Burmese rubies to royal blue Kashmir sapphire. If it exists, we can get it to you – and we can get it to you for a better price than anyone else can. Guaranteed.

We can also source rough gemstones and have one of the cutters from expansive network cut it to your exact specifications. Whether you want a large number of tourmaline beads for jewelry making or are looking to turn an exceptional ruby rough into a world-class addition to your collection, we have access to cutters from around the globe to match your exact requirements.

From budget cutters in Thailand who can do decent work for $1/CT to AGTA-winning masters, our network is one of the biggest and best on Earth.

What’s the cor gems story?

My name is Muhammad Ali. I am the CEO of cor gems. I am obsessed with two things: gemstones and customers!

My gem career began when I was fifteen years old. It was a sunny summer day and I was at a garage sale with my mother. There was a dollar bin full of books on everything from astronomy to equine studies, but it was the book on gemstones that piqued my interest.

I was amazed by the historical significance, the rarity, and above all the beauty of these treasures from mother nature. I read every single page cover to cover but it wasn’t enough! I read my way through every book on gems at both my school and public library!

I realized I had to get my hand on the real thing. I turned to the internet purchased some stones online. I was disappointed by how much duller the stones were compared to the pictures in the listings.

It occurred to me that if I was disappointed with my purchase that other customers must be just as disappointed. I began researching gemstone suppliers. Although gems are mined everywhere from Madagascar to Myanmar, almost every gemstone passes through Thailand at one point or another.

Whether it’s to be cut, certified, or sold, the majority of the world’s fine gemstones pass through the Thai border before reaching their final destination. I reached out directly the Thai cutters and built up our Rolodex of contacts. After years of purchasing as a collector and supplying local manufacturers, I had finally achieved the supplier base that allowed me to take cor gems international.

Fast forward to today and cor gems is an international powerhouse with customers on every continent except Antarctica.

None of this would have been possible without my hardworking team, my supportive family, and above all, my amazing customers.

Thank you,

Muhammad Ali – CEO, Cor Gems





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Pricing & Details

Auction ID 855878
Watchers 5 watching
Viewed 601 times
Starts 1st Jan 2019 4:34am PST

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