Monday, 31 March 2008

Mineral Spot: Analcime...

I have posted an analcime photo before (see here). However, I took this photo tonight and thought it worthy of uploading too. It is an analcime crystal sitting on calcite from the Bundoora Quarry in Melbourne, Victoria, and is 2mm FoV.

It is also another specimen that will be included in one of my auction lots next week at OZtion...

Monday, 17 March 2008

Mineral Spot: Hematite...

Hematite is an iron oxide mineral and can occur in many forms. These include thin hexagonal plates that may appear red, thicker tabular crystals, botryoidal masses, earthy, and this form, which is spheres that have attached themselves to an edenite crystal.

This is a specimen from Hendersons Quarry, Ngongataha, near Rotorua, New Zealand, collected by me in October last year.

Sunday, 16 March 2008

New Issue of Mineral Collector Magazine...

The fifth issue of the Australian and New Zealand Mineral Collector magazine is now out. This issue contains articles on 'chrome' cerussite; namibite from Queensland; White Island, a volcano off New Zealand; davidite from South Australia; a collector's tale from Larry Rush; and a 2007 symposium and seminar report.

It is full colour, 28 pages, and only $10US available from Lulu.

If you are going to order a copy directly, can I suggest that you use the 'Standard' option for shipping. It is by far the most economical, and usually arrives within a couple of weeks.

Thursday, 6 March 2008

Mineral Spot: Calcite...

The last post was the orthorhombic form of calcium carbonate, aragonite. This time I have a picture of the trigonal form, calcite.

Calcite comes in many different crystal habits. Over 1,000 forms in fact. This is an almost globular form of calcite from Flinders in Victoria.

It is also another specimen that will be included in one of my auction lots next week at OZtion...

Tuesday, 4 March 2008

Mineral Spot: Aragonite...

Aragonite is the orthorhombic form of calcium carbonate, with the most common form, calcite, having a trigonal crystal symmetry. Crystals such as the ones in the photo commonly occur in cavities in basalt rocks. This specimen is from a basalt quarry at Learmonth near Ballarat, Victoria.

It is also a specimen that will be included in one of my auction lots next week at OZtion...

Monday, 3 March 2008

Hot Spot: The House is on Fire!

Summer is over, but there is still a bit of heat about. Or at least, that's what you would think looking at this shot. Some superb morning skies in the last couple of days!