Almost 1000 Minerals on Phdminerals!

We will soon reach 1000 minerals on PHDMinerals! This is a nice milestone. Here are some pictures of minerals we added recently.

This large and spectacular specimen features many lustrous orange Wulfenite crystals on a plate-shaped matrix. It has all the main characteristics you would expect from its classic locality of Los Lamentos Mts, Mun. de Ahumada, Chihuahua, Mexico. (Largest cubes are around 1 cm).

This large and spectacular specimen features many lustrous orange Wulfenite crystals on a plate-shaped matrix. It has all the main characteristics you would expect from its classic locality of Los Lamentos Mts, Mun. de Ahumada, Chihuahua, Mexico. (Largest cubes are around 1 cm).

Pyromorphite pseudomorph after Cerussite on a contrasting green Malachite matrix. This specimen was found in 1974 at the famous Brown's Prospect, Rum Jungle, Batchelor, Coomalie Shire, Northern Territory, Australia.

Pyromorphite pseudomorph after Cerussite on a contrasting green Malachite matrix. This specimen was found in 1974 at the famous Brown’s Prospect, Rum Jungle, Batchelor, Coomalie Shire, Northern Territory, Australia.

This spectacular specimen features a pale pink Morganite crystal (2.5 cm long) and a couple of green Tourmalines on a Quartz matrix. It is from Afghanistan (most probably Konar Province).

This spectacular specimen features a pale pink Morganite crystal (2.5 cm long) and a couple of green Tourmalines on a Quartz matrix. It is from Afghanistan (most probably Konar Province).

Exclusive pink orange Cobaltocalcite Katanga Congo

Here you have a really superb Cobalto-Calcite. It has vibrant pink and orange colors. So vibrant the picture colors seem enhanced. It’s from Congo (Katanga)
4.9 x 3.8 x 3.0 cm

cobaltocalcite mineral-1 cobaltocalcite mineral-2 cobaltocalcite mineral-3 cobaltocalcite mineral-4 cobaltocalcite mineral-6

Superb green Pyromorphite thumbnail Dao Ping Mine China

Beautiful thumbnail Pyromorphite. You can see nice stepped shiny crystals. It’s from Dao Ping Mine, Guan Xi, China. The specimen measures 2.4 x 1.7 x 1.5 cm
pyromorphite mineral-1 pyromorphite mineral-2 pyromorphite mineral-4 pyromorphite mineral-5 pyromorphite mineral-6

Deep purple Amethyst from Boekenhoutshoek South Africa

We have a beautiful Amethyst with deep purple tips that look like stars, available. It’s from Boekenhoutshoek, Mkobola, Nkangala District, Mpumalanga, South Africa. The specimen measures 6.7 x 6.5 x 4.5 cm. It’s is much nicer in person.

amethyst mineral-1 amethyst mineral-2 amethyst mineral-3 amethyst mineral-6

Mineral – Vesuvianite

Vesuvianite, also known as Idocrase, is a calcium-magnesium-aluminum silicate with the composition Ca10(Mg, Fe)2Al4(SiO4)5(Si2O7)2(OH,F)4 which can be variable. It was first identified in 1795 among the ancient ejections of Vesuvius, Mte. Somma, Italy, hence its name.

It can be green (var. Chromian), pink to purple (var. Mangano-vesuvianite), brown, yellow, or blue. Vesuvianite crystallizes in the tetragonal system, often prismatic or pyramidal crystals. It is mainly found in skarn deposits and limestones that have been subjected to contact metamorphism. It also occurs as compact masses and is often associated with Grossularite, Diopside, Clinochlore, Phlogopite and Wollastonite.

The hardness is 6.5 on the Mohs scale and it’s streak is white.

Vesuvianite is found in many countries including USA (Maine and California), Russia (Vilyui River Basin), Italy, Mexico and Canada, which produces highly lustrous and brilliantly-colored forms of this mineral. Best known are the vividly-colored and multicolored varieties that come from the Jeffrey Mine in Asbestos, Quebec, which are stunning and classic forms of this mineral.

Vesuvianite close up

PHDMinerals offers at reasonable prices Vesuvianite specimens from the Jeffrey Mine.

Here is a interesting post about the benefits of Calcium

Tucson 2015

Tucson Days Inn SuiteIn January, I decided it was time for me to visit the famous Tucson Mineral show. I gave myself 6 days to visit the town and do as many shows I could. I must say, the amount of mineral we are presented is quite overwhelming. The first stop was in the Days Inn & Suites where you have over 350 rooms to visit. You can get a vague idea of the place from the picture. I was there pretty early, some rooms were still not open but most of them were ready. You can spend sometimes easily 30 minutes to discover all the wonder in one room. A room had impressive Panasqueira Apatite, large cabinet perfect specimens. There was the Dioptase room, hundreds of dioptase minerals from Russia in all sizes and quality, they also had flats available.
purchase tucsonMany vendors had Rogerly fluorites, I bought 5 specimens displayed on the right. There was also many minerals from Bulgaria, it is quite impressive to see the quantity of minerals that come from the Madan Bulgaria region. I’m very interested about the melted Galena form we see coming from there. I wonder what phenomenon causes this. Here is an example of melted Galena. I also bought an interesting gem Sphalerite, it’s the little piece down the bottom on the picture. I’ll write about it soon with more pictures, specially when it’s back lit as the green yellowish color is quite sensational.

Below are some pictures of the stands you could find on another site. If you take the time to look carefully, you can always find some nice treasures on the tables and flats. We bought some pyrites, sphalerite, galena minerals from Jean Claude who had many Peruvian mineral specimens for sale.

IMG_0408 IMG_0409 IMG_0410 IMG_0411 IMG_0413

Mineral – Adamite

Adamite is an orthorhombic zinc arsenate hydroxide mineralZn2AsO4OH. It is a mineral that typically occurs in the oxidized or weathered zones. Pure adamite is colorless, but usually it possesses yellow color due to Fe, in association with limonite, smithsonitehemimorphitescoroditeolivenitecalcitequartz and iron and manganese oxides .

Color can be green due to trace amounts of copper and or uranium, yellow, rarely white and occasionally purple due to trace amount of cobalt. The yellow to bright lime-green colored crystals make adamite a favorite among mineral collectors. Found in Mapimí, DurangoMexicoGreece; and California and Utah in the United States.

Adamite was named after the French mineralogist Gilbert-Joseph Adam (1795-1881). It was first described in 1866 for an occurrence at the type locality of ChañarcilloCopiapó ProvinceAtacama RegionChile.

Hardness is of 3.5 on the Mohs scale and a density between 4.32 and 4.48.

Luster is adamantine. Crystals are transparent to translucent. Crystal Habits include diamond shaped, wedge-like prisms sometimes modified with minor prismatic faces and terminated by a double triangle, mostly in druses and radiating clusters that can form wheel and wheat sheaf shapes.

Adamite Mineral

 

 

 

 

 

 

PHDMinerals offers Adamite specimen from Mexico

 

Mineral – Pyrochlore

Pyrochlore is  a complex oxide mineral, (Na,Ca)2Nb2O6(OH,F). It is  as a solid solution between the niobium end member (pyrochlore), and the tantalum end member (microlite).  Pyrochlore crystals are usually well formed (euhedral) crystals, occurring usually as octahedra of a yellowish or brownish color and a resinous luster. Sub-translucent to opaque It can also be dark reddish or blackish brown.

Pyrochlore is brittle with a hardness of 5 – 5.5 on the Mohs scale and a density of 4.2 to 4.36.

It was first described in 1826 for an occurrence in Stavern in Norway.

The three largest producers of niobium ore are mining pyrochlore deposits. The largest deposit in Brazil is the CBMM mine located south of AraxáMinas Gerais, followed by the deposit of the Catalão mine east of CatalãoGoiás. The third largest deposit of niobium ore is Niobec mine west of Saint-Honore near ChicoutimiQuebec, Canada.

Pyrochlore ore typically contains greater than 0.05% of naturally occurring radioactive uranium and thorium.

Nice pyrochlore crystals, associated with magnetite were produced at the St Laurence Columbium Mine, Deux-Montagnes Co., Québec, Canada.The mine opened in 1961 and ceased operations around 1977. During its operation it was one of largest niobium mine in the world. Significant reserves of pyrochlore (the main ore mineral) remain at the deposit. The processing plant and headframe were demolished in 1992.

PHD_107a

 

 

 

 

 

 

PHDMinerals offers at reasonable prices pyrochlore from Oka.

Smoky Quartz From Switzerland

We recently added 5 Smoky Quartz from the French Alps. It has been a success as two of them were sold less then 3 hours after posting them. Don’t worry since we still have three beautiful Swiss Quartz available. I’ll show you a picture of each, if you want to see more, simply click on the name link.

Quartz 22 Val Ferret

PHD_508 facebook

 

 

 

 

 

 

 

Quartz 23 Le Tour Noir

PHD_509 facebook

 

 

 

 

 

 

 

Quartz 24 Le Tour Noir

quartz mineral-5