Saturday, 28 July 2007

Mineral Spot: Fluorescence...

Quite a few minerals 'glow' under ultraviolet light (known as 'UV'). Some of the colours can be very intense. This particular specimen is franklinite (black), zincite (orange-brown) and the pale mineral is calcite. To the right of the image, you can see how this pale-coloured mineral has reacted to short wave UV. Interestingly, this specimen does not react to long wave UV (some minerals react to one and not the other, some to both). The specimen comes from Franklin, New Jersey, a location well-known for its fluorescent minerals.

Friday, 20 July 2007

Mineral Spot: Supa Nova...

Being a bit 'artistic'. This supernova is actually a calcite specimen from Fyannsford, near Geelong, Victoria...(see this photo). It will also be on my auction site in a batch of 10 mineral specimens this coming Sunday.

Thursday, 19 July 2007

Mineral Spot: Reticulated Cerussite...

So what is 'reticulated' you might ask. Its the name given to a crystal habit of forming 'net-like' growths. Cerussite commonly forms in this way. As you can see in the photo, individual crystals form a regular arrangement, crossing each other at 60 degree angles.

This specimen, which has green malachite associated, is from Brown's Prospect, Rum Jungle, Northern Territory, Australia.

It was included in one of my recent auction lots and now resides in a Queensland collection.

Sunday, 15 July 2007

Hiding Spot: Tasmanian Rosella...

Must be tough finding enough food during Winter. This Tasmanian Rosella also known as a Green Rosella (Platycercus caledonicus) is an endemic Tasmanian parrot and has been visiting a tree fern at the back of our house regularly in recent times.

Tuesday, 10 July 2007

Odd Spot: Turquoise (Not!)...

Looking for all the world like a carved turquoise figure, this little chap from the National Gallery of Victoria had me a bit perplexed. Other labels had talc or serpentine or some other carving material noted, but this one had 'faience'. I didn't know what this was until I got back home and was able to look it up and found that it is tin-glazed pottery.

This one is labelled as a 'Pataikos amulet' from the Egyptian Ptolemaic Period, 332-330BC.

Monday, 9 July 2007

Odd Spot: The Wedding Sausage...

Friends of ours got married on Saturday night in Melbourne.

Instead of a wedding cake, we had wedding sausage!