Unheated Pleochroic Tanzanite - Meralani Hills, Tanzania | 16 Carats
Locality: Tanzania | Dimensions: 2.0 x 1.0 x 1.0cm
Use code “OPENBOX” if you would like to hold an open box! Scroll down to open box policies for more details & codes!
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PRODUCT DETAILS
Weight: 3.2 grams
Dimensions: 2.0 x 1.0 x 1.0cm
Treatment: Unheated (natural color)
Crystal Form: Specimen-grade crystal with strong termination
Optical Feature: Strong pleochroism (four observable color directions)
This is a natural, unheated tanzanite crystal specimen from Tanzania, preserved in its original state without any thermal enhancement. Unlike the vast majority of tanzanite on the market—which is routinely heat-treated to force a single dominant blue—this specimen retains its full optical complexity.
Pleochroism
Tanzanite is a strongly pleochroic gemstone, meaning it displays different colors depending on the viewing angle and light direction. In this specimen, four distinct color directions can be observed, shifting between blue, violet, yellow and secondary tones as the crystal is rotated.
This phenomenon occurs due to tanzanite’s anisotropic crystal structure, where light is absorbed differently along separate crystallographic axes. In simple terms: the crystal physically handles light in multiple ways, revealing colors that heated or heavily cut stones often lose or suppress.
You will receive the exact specimen in the listing photos and videos
REVIEWS
Shipping & Returns
Processing Time
Every order is packed with care — especially delicate specimens and high-grade minerals. Please allow 3–5 business days for processing before your order is shipped.
Shipping Timeframes
Once shipped, you’ll receive tracking by email or SMS depending on your notification preferences.
Estimated delivery windows:
- Canada: 1–5 business days
- USA: 3–7 business days
- International: 10–21 business days
These timelines are estimates and may vary based on carrier delays, customs, or regional logistics.
Damaged Orders
If your package arrives damaged, contact us within 48 hours of delivery.
Email: info@bellissimacrystals.com
Include the following in your message:
- Order number
- Clear photos of the outer packaging
- Clear photos of the damaged item
Once verified, we’ll provide one of the following based on availability:
- A replacement
- Store credit
- A refund
We do not require you to return broken or damaged items. That’s pointless and you shouldn’t have to deal with it.
Returns & Exchanges
All sales are final.
Because every crystal is unique, we do not accept returns or exchanges unless an item arrives damaged. Please review photos, videos, measurements, and descriptions before purchasing. If you’re unsure about a piece, reach out before checkout — we’re happy to help.
Open Box Policy
Our Open Box system is designed to help you save on shipping while building your collection at your own pace.
When checking out, you can choose to hold your order and keep building an open box until you’re ready to ship — or until you hit a shipping threshold.
How It Works
- Add items to your cart as normal.
- At checkout, enter one of the Open Box codes below.
- We’ll hold your items and combine them with any future purchases until you choose to ship.
Each purchase builds onto the same open box under your name/account.
Open Box Codes
Code OPENBOX holds your order open, use this code when you want to continue adding items later
OPENBOXFREE ships your box for free please use it only when your open box total hits $150+
OPENBOXFLAT applies $10 flat-rate shippingUse if your open box total is between $100-$150 and you’re ready to ship
Only one code can be applied per checkout.
Shipping Thresholds
- $150+ → FREE shipping using OPENBOXFREE
- $100-$150 → $10 flat shipping using OPENBOXFLAT
- Not ready to ship yet? → Choose OPENBOX to keep building


