The cor gems mission is to deliver the best customer service on Earth!

FREE Returns & Exchanges

• Free return shipping & No restocking fee.
• 60-day return period.

FREE Insurance

• Comprehensive coverage for all your cor gems purchases.
• Receive your item or get your money back. Guaranteed.

FREE Tracked & Insured Shipping!

• Complimentary shipping with door-to-door tracking and comprehensive insurance
• Shipment via USPS, PostNL, Asendia, Canada Post, or FedEx

• Canada/USA: 3 - 10 business days
• Western Europe & Australia: 10 - 21 business days
• Rest of the world: 14 - 30 business days
• Delivery may be delayed by customs 

Details

Species: Natural Tanzanite

Dimensions: 34.22 x 25.38 x 15.68 mm 

Treatment*: Heated; Clarity Enhanced (Colores Oil*)

Origin: D-Block Mine, Merelani Hills, Tanzania 

*Same treatment used for emerald.

4 Cs

Carat Weight: 116.16 carats 

Color: Blue-Violet*

*Vivid deep violetish blue color. The GIA color is violet. 

Cut: Oval Cabochon 

Clarity: Transparent to Semi-Transparent 

The back of this stone features an iridescent rainbow phenomenon caused by an internal conchoidal fracture; see the video. 

Certification

Gemological Institute of America (GIA) - Opal Identification Report
Report Number: 2205871771

Online Report Verification

Social Media

Instagram: @cor_gems

Shipping

• All cor gems parcels are shipped with tracking and comprehensive insurance.

• Take a full 14 calendar days to combine as many purchases into one order as you like.

• Priority/Express shipping services are available at cost.

Custom Orders

• The inventory of gemstones we can provide customers with is thousands of times larger than what we can offer on GemRock Auctions
  
• We have access to the best gems on Earth. Including:
  • Burmese rubies, Kashmir sapphire, Colombian emerald, Ceylon Padparadscha, Jedi spinel, Russian alexandrite and demantoid, Brazilian Paraíba