9.58 Tanzanite and 2.62 Diamond 18K White Gold Ladies Ring by Michael Christoff

$ 22,326.00

Product Description

This is an exquisite oval cut tanzanite and diamond ring that is difficult to stop admiring. When looking at the stone it is easy to imagine diving into the pristine blue Caribbean waters.  The tanzanite stone has the unique ability to show different colors at various angles...one moment the color is deep blue and the next it is vivid violet. The shank is marked M. Christoff.


We offer a GIA Graduate Gemologist appraisal on this item. The printed and stamped appraisal will accompany the ring upon purchase.


Metal type:                  White gold

Gold content:              18K
Total weight:               6.6 grams
Size:                           6 3/4
Estimated value:         $32,100
SKU:                           RCJG00018

Main Stone

Variety:            Natural Tanzanite
Cut:                 Oval
Cut grade:       Excellent
Clarity:            Transparent
Color:              Violet Blue
Carat Weight:  9.58
Species:           Zoisite
Treatment:       Many colored stones including tanzanites are presumed heated.
Hardness:        6.5 – 7

Adjacent Stone

Variety:           Natural Diamond
Cut:                 Baguette, round brilliant
Cut grade:        
Clarity:            VS2 – SI1
Color:              F - H
Carat Weight:  2.62 ctw
Species:           Diamond
Treatment:       None
Hardness:        10


  • The safest way to clean tanzanite is to use warm soapy water and a soft brush.
  • Never use ultrasonic or steam cleaners with tanzanite.
  • Do not subject to tanzanite to high heat or strong chemicals.
  • Tanzanite can cleave (break) when struck in just the right way for the gem.  Using usual care when wearing or storing the stone greatly reduces any risk.

For more information about tanzanite care, use this link to the GIA education site: Tanzanite Care and Cleaning Guide.


This item qualifies for Premium Shipping. Premium Shipping at Couleurs is always free. This item ships UPS 2 day and requires an adult signature. Items are usually shipped within two business days after payment clears.

Our return policy lasts 14 business days. If 14 business days have gone by since you received the item, unfortunately we can’t offer you a refund or exchange.

To be eligible for a return, your item must be unused and in the original condition that you received it. It must also be in the original packaging. The item will will be inspected upon our receipt to ensure it is unaltered. If the item is found to be altered in any way, it will be returned to you at your expense and no refund will be made.

To complete your return, we require that you contact us prior to sending the return for proper instructions. You may contact us at:


Couleurs Jewelry and Gemstones, LLC
20070 Ashbrook Commons Plaza
Suite 191
Ashburn, VA 20147




571 510 3850


Return Shipping

To return your product and unless told otherwise, you should mail your product to:

Couleurs Jewelry and Gemstones, LLC
20070 Ashbrook Commons Plaza
Suite 191
Ashburn, VA 20147

Please return the item using "Signature Confirmation Upon Delivery Required".

We suggest that you insure the shipment for its purchase price since we are not liable if your return is lost or stolen in transmit from you to us.
You will be responsible for paying for your own shipping costs for returning your item. Return shipping costs are non-refundable.

Refunds (if applicable)

Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.

If you are approved, then your refund will be processed, and a credit will automatically be applied to your credit card or original method of payment, within 7 days.

Late or missing refunds (if applicable)

If you haven’t received a refund yet, first check your bank account again.
Then contact your credit card company, it may take some time before your refund is officially posted.
Next contact your bank. There is often some processing time before a refund is posted.
If you’ve done all of this and you still have not received your refund yet, please contact us at admin@couleursjewelry.com.

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