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Grossular & Diopside

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LMB647469

Grossular & Diopside

Classic Locality

Description Tabs

Description
Locality: 
Belvidere Mountain Quarries, Lowell & Eden, Orleans County, Vermont, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.4 × 1.6 × 1.3 cm
Weight: 
3.00gr
Description

This is a beautiful example of grossular and emerald green diopside (or vesuvianite) from the classic Belvidere Mountain locality. Overall, the grossular is about 1.2 cm in diameter, with edges to ca 8 mm.

Regarding the diopside vs vesuvianite: Some of the crystals are well terminated. In fact, so well terminated, that diopside seems a bit dubious. However, the crystals don’t look tetragonal to me.

Which doesn’t mean all that much, because crystals can be tricky critters, and I admit that I am easily fooled. I claim grossular. The diopside vs vesuvianite I leave up to you. See the last pair of photos (FOV 4.6 x 6.7 mm) for a close-up of some of the terminations. Note also the little blobs of Cu mineralization - probably malachite with perhaps a bit of azurite (which, however, is not listed for this locality). These crystal are also shown in the last pair of macro photos.

Also note the apparent shape of the grossular in the first photo. In this orientation, the grossular could be mistaken for a cube - which shows just how tricky morphology can be. In this case, with such a large crystal it is easy enough to get a different angle of view which quickly reveals that it is really a dodecahedron. But with small and/or intergrown crystals, things are not always so easy.

Single item shipping weight (with TN case) is 3.1 oz (88 g). For shipments outside the USA, up to a total weight < 8 oz (225g), this can be combined with items from this or other auctions for the same postage.

Within the USA, postage for total weights up to 13 oz ranges from $4.25 to $6.50 (including packing etc) regardless of destination. Above 13 oz, I will use “own box” Priority Mail. The rate, including packing, varies by destination from $7.25 to $9.50.

See my updated “Shipping Policy” for details

Mineral Data
What's on the rock

Grossular

Formula: 
Ca3Al2(SiO4)3
Strunz: 
9.AD.25
Hardness: 
6.5 - 7.0
Type Locality: 
Akhtaragda River mouth (Achtaragda River mouth), Vilyui River Basin (Vilui River Basin; Wilui River Basin), Sakha Republic (Saha Republic; Yakutia), Eastern-Siberian Region, Russia

Diopside

Formula: 
CaMgSi2O6
Group Parent: 
Clinopyroxene Subgroup
Strunz: 
9.DA.15
Crystal System: 
Monoclinic
Hardness: 
5.5 - 6.5
Streak: 
white
LMB minerals

Seller Information

Payment options: offline, paypal_wpp, paypal_wps

Seller's terms and conditions

In addition to the standard terms and conditions, please note the following. Almost all IDs are visual. While in most cases the ID is obvious, there may be cases where it is not. If you are doubtful about a particular ID, please ask for more information. Or do not bid! Similarly, if you are not sure that the specimen meets your criteria, do not bid. I have tdone the best I can with the photos. Nevertheless, if you are not happy with a specimen for any reason, I will refund the bid price – but not the shipping costs (unless the fault is clearly mine) – if the specimen is returned. This policy applies even if analysis of the specimen shows that my ID was incorrect. When in doubt, ask - or don’t bid. Note that most crystals at MSH and Varennes are micros - even if on large specimens. Please pay attention to the stated sizes. Any customs duties, fees etc. are the responsibility of the buyer.

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