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Fluorite With Siderite & Quartz

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TVM1079135

Fluorite With Siderite & Quartz

Munich Show 2024
Fluorescent

Description Tabs

Description
Locality: 
Boltsburn Mine, Rookhope, Weardale, County Durham, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Museum (18cm plus)
Size: 
23.2 × 8.5 × 7.2 cm
Largest Crystal: 
2.30cm
Weight: 
2 200.00gr
Description

A matrix-free stalactitic formation of untwinned cubic fluorite crystals grown in a free-form stalactite, possibly the remnants of a fossil coral which are known to occur in the limestone flats in the area.

The fluorite crystals are deep mauve with a glassy lustre and some whitish centres but gemmy margins to the edges.

The paragenesis appears to have continued with a partial deposition of sparkling quartz crystals and further deposition of tan-coloured siderite, which on the display side partially covers the faces preferentially.

The reverse of the specimen shows a more solid coverage of the same siderite.

The piece has detached post-formation, with additional siderite being crystallised to the breakage point in the base.

A very unusual specimen with good aesthetics, likely to have been collected in the operational Boltsburn mine prior to closure in the 1930s.  

However, due to its size, weight, and natural post-formation detachment, there are a few marks and areas of slight damage to the display side.

The colour of the piece is stronger in daylight, and the whole specimen fluoresces strongly under long-wave UV.

The specimen weighs in at 2.2 kilos, which with additional packaging brings the shipping weight to approximately 2.5 kilos.

Please note that additional shipping costs may apply for delivery overseas.

Condition
General: 
Excellent - aesthetic specimen
Main Display: 
Good - some minor marks
Lustre: 
Mostly very bright
Mineral Data
What's on the rock

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Quartz

Formula: 
SiO2
Strunz: 
4.DA.05
Crystal System: 
Trigonal
Hardness: 
7.0
Streak: 
White

Buy Now price

£435
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Shipping Information

Postage Area Price
UK Inland
£10
Europe (Tracked & Signed)
25
USA (Tracked & Signed)
$60
Rest of World (Tracked & Signed)
$60

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

Our Terms and Conditions - 31 December 2020

RESPONSE TIME: We will generally respond within 24hrs to questions and purchase requests, via the e-Rocks contact and invoice system.

If you contact us directly via email this will be the same, via social media this cannot be guaranteed.

PAYMENTS: All transactions must be in UK Pounds, US Dollars, or Euros.

Preferred payment is via PayPal, we also take credit/debit card payments via PayPal Merchant Services all available and secure via e-Rocks invoice payments.

Transactions are between Buyers and Sellers on e-Rocks using PayPal are covered by PayPal's Buyer/Seller Protection - subject to their Terms & Conditions.

Under PayPal's terms, we reserve the right to use your registered PayPal address only as delivery address. Please check with us before bidding/buying if you wish to have an item shipped to another address.

UK payments can also be made offline or via interbank electronic transfer, we will supply details if that is your preference.

SHIPPING: Please refer to shipping costs quoted on individual items and shipping policy section on the item page. All shipping costs subject to prevailing UK Royal Mail rates, which might change.

ThamesValleyMinerals reserves the right to change these rates should underlying costs change.

Shipping costs will economise when 2 or more specimens are purchased together.

We will always quote and charge actual costs. Insurance, Recorded Delivery or alternative Carrier can be provided at cost to purchaser.

The mailing address for ThamesValleyMinerals is:

ThamesValleyMinerals
21 the Grove
TWYFORD
Berkshire
RG10 9DU
United Kingdom

EXPORTS: Please note that all shipments originate in GB - shipments to Northern Ireland, EU and other countries will be classed as export from GB.

We will make appropriate export customs declaration with the shipment however buyers will be responsible for any import charges levied at your country border.

If applicable; these will vary according to the destination - applicable charge rates should be available by checking import charge thresholds and also checking CN code 9705000090 (collectable mineral specimens) on your own Government Customs website.

FOR ALL CUSTOMERS: Once we receive your payment we'll package up the specimen(s) and send them within 5 days – unless you request a Shipping Hold.

RETURNS: If you receive anything you do not like you have a 10-day approval and right to return a specimen(s).

Please notify us immediately (but within the 10 days) and send it back if it arrives damaged or if you are not otherwise happy with what you have been sent. Once we have received the returned specimen in the condition it was sent we will return your money plus your return costs (limited to postage).
This policy applies to every specimen we supply but please within the 10-day approval period!!

Our intention is only to supply material with 100% customer satisfaction.

If a specimen is not back with us after 15 days (allowing 5 days for UK return shipping) of receipt of the specimen, We will assume that you are intending to keep the specimen and the transaction will become final.

US, European and Worldwide customers wishing to return specimens will have a longer period allowed for shipping depending on their location. However we must be notified of your intention to return a specimen within 10 days of receiving it however.

Please Note: From outside GB Customs Declaration CN22 must be completed "Goods Return to Vendor" with CN code 9705000090.

REMEMBER: if there is anything you do not understand, want to ask or would like slightly different - please ask.

Thank you!