Betrandite is a fairly rare beryllium silicate, and crystals are typically small worldwide, usually less than 1 cm. These new specimens from Golconda feature crystals measuring OVER 3 cm(!) which is world-class for the species. Not only are these monstrous crystals, but the quality is as good as it gets showing a glossy vitreous luster and a gorgeous porcelain-white hue. This particular piece features a pair of a top quality, highly lustrous, layered groups of Bertrandite measuring up to 3.0 cm aesthetically set on minor matrix. It's incredibly rare to find good matrix specimens of Betrandite, let alone pieces with such enormous fine quality crystals. From a new find at the end of 2016, these specimens are arguably the finest examples of the species extant. Back in the late 1980s or early 1990s (according to various sources) there was a discovery at the Golconda Mine that produced some extraordinary Bertrandites. These specimens were quickly forgotten, and only a few of them are seen on the market coming out of old collections. Fortunately a second (but also very limited) discovery was made at the end of 2016, and a handful more of these outstanding Bertrandites showed up at Tucson. We were lucky to have first pick from a parcel that belonged to a good friend, and we were blown away by both the size and quality of these crystals. We selected the best pieces in terms of size and quality. A great miniature specimen for anybody who collects pegmatite minerals, Brazilian minerals or just top quality minerals specimens.
Locality: Golconda Mine, Governador Valadares, Minas Gerais, Brazil
Specimen Size: 3.5 x 2.2 x 2.0 cm (miniature)
Largest Crystal: 3.0 cm.
Shipping from United States
1-3 business days
Estimated shipping times
- North America : 2 - 5 business days
- Europe : 7 - 14 business days
- Australia, New Zealand and Oceania : 10 - 20 business days
- Asia Pacific : 7 - 14 business days
I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.
Customs and import taxes
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.
Returns & Exchanges
I gladly accept returns, exchanges, and cancellations
Just contact me within: 14 days of delivery
Ship items back to me within: 30 days of delivery
Conditions of return
Buyers are responsible for return shipping costs. If the item is not returned in its original condition, the buyer is responsible for any loss in value.
Questions about your order?
Please contact me if you have any problems with your order.
Last updated 3 July 2022.
Additionally, I will make every reasonable effort to inform you when I interact with third parties with your information; however, you are solely responsible for reviewing, understanding, and agreeing to or not agreeing to any third-party privacy policies.
Information I Collect
To fulfill your order, you must provide me with certain information (which you authorized Etsy to provide to me), such as your name, e-mail address, postal address, payment information, and the details of the product that you’re ordering. You may also choose to provide me with additional personal information from time to time if you contact me directly.
Why I Need Your Information and How I Use It
I collect, use and share your information in several legally-permissible ways, including:
- As needed to provide my services, such as when I use your information to fulfill your order, to settle disputes, or to provide you with customer support;
- When you have provided your affirmative consent, which you may revoke at any time, such as by signing up for my mailing list or to receive notifications from me;
- If necessary to comply with a court order or legal obligation, such as retaining information about your purchases if required by tax law; and
Information Sharing and Disclosure
Protecting my customers’ personal information is crucially important to my business and something I take very seriously. For these reasons, I share your personal information only for very limited reasons and in limited circumstances, as follows:
- With Third-Party Service Providers. I engage the following trusted third parties to perform functions and provider services to my shop:
Google Analytics, which helps me understand how visitors browse Mineral Classics. You can read more about how Google uses your Personal Information here: https://www.google.com/intl/en/policies/privacy/. You can also opt-out of Google Analytics here: https://tools.google.com/dlpage/gaoptout.
USPS, to deliver your order
FedEx, to deliver your order
QuickBooks, to do my books and taxes
Constant Contact, to send emails and newsletters
I share you personal information with these third parties, but only to the extent necessary to perform these services;
- In the Event of a Business Transfer. If I sell or merge my business, I may disclose your information as part of that transaction, only to the extent permitted by law.
- In Compliance with Laws. I may collect, use, retain, and share your information if I have a good faith belief that doing so is reasonably necessary to: (a) respond to legal process or to government requests; (b) perform legal obligations to which I am bound by agreements; (c) prevent, investigate, and address fraud and other illegal activity, security, or technical issues; or (d) protect the rights, property, and safety of my customers, or others.
How Long I Store Your Information
Transfers of Personal Information Outside the EU
I may store and process your information through third-party hosting services in the US and other jurisdictions. As a result, I may transfer your personal information to a jurisdiction with different data protection and government surveillance laws than your jurisdiction has. If I am required to transfer information about you outside of the EU, I rely on Privacy Shield as the legal basis for the transfer, as Google Cloud is Privacy Shield certified.
If you reside in certain territories, including the EU, you have a number of rights in relation to your personal information. While some of these rights apply generally, certain rights apply only in certain limited cases. Your rights are as follows:
- Right to Access. You may have the right to access and receive a copy of the personal information I hold about you by contacting me using the contact information below.
- Right to Change, Restrict, or Delete. You may also have rights to change, restrict my use of, or delete your personal information. Absent exceptional circumstances (such as where I am required to store information for legal reasons) I will generally delete your personal information upon your request.
- Right to Object. You can object to (a) my processing of some of your information based on my legitimate interests and (b) receiving marketing messages from me. In such cases, I will delete your personal information unless I have compelling and legitimate grounds to continue storing and using your information or if it is needed for legal reasons.
- Right to Complain. If you reside in the EU and wish to raise a concern about my use of your information (and without prejudice to any other rights you may have), you have the right to do so with your local data protection authority.
How to Contact Me
You may reach me with any concerns relating to privacy at firstname.lastname@example.org , or by mail at my physical address PO Box 620982 Littleton, CO 80126 United States addressed to Brian Kosnar Mineral Classics.
For purposes of EU data protection law, I, Angela Kosnar, am the data controller of your personal information. If you have any questions or concerns, you may contact me at email@example.com.