INDEX TO DISPLAYS


New Display:ANZACs and Gallipoli

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Patterns in the Mind: The Nothing in a Mouse

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The Cell Inside the Star Sand


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Optical Illusions

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Circles - Hidden Geometry and Secret Windows

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Runes - An Ancient Alphabet

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SAND DISPLAY

Become an Arenophile - Start collecting sand... It's dinolite- addictive!

Go treasure hunting in the sand samples, piece together some molecules to discover why crystals are the shapes they are, make your own set

of crystal models out of paper...

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The sand samples

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Students embarking on a treasure hunt....

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Garnets galore!

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Crystal building resources in the Allen Centre

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Noah's crystal of calcite

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Robbie and Toby build pyroxene with a chain

of silicon dioxide molecules

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Olivine: A single molecule of silicon dioxide.

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Pyroxene : A double silicon dioxide chain sharing

two oxygen atoms.

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Hornblende: A double chain of silican dioxide

sharing three oxygen atoms.

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Mica: A sheet of silicon dioxide sharing three oxygen

atoms with its neighbour.

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Quartz and Feldspar: a 3-D spiral of silicon dioxide

sharing all its oxygen atoms with its neighbours.

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Well done, girls!

Below are dinolite photographs of sand grains in the sand sample collected from Sandfly Bay on the Otago Peninsula.

Discover red garnets, transparent rock crystal, banded agates, flakes of mica, fragments of hornblende and pyroxene as well as tiny pieces

of polished shell. Scroll down to identify the grains...

Except for the quartz sand grains (bottom left) which have been magnified 50X, the grains have been magnified 200X. Simply STUNNING!

dino sand-014.jpg
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dino sand-005.jpg
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Some crystals to look for in your sand specimens:

These crystals are rock-forming minerals and become grains of sand when the rock weathers and breaks down.

The grains can appear brightly coloured because their surfaces have been polished by rolling around in rivers and the sea.

olivine crystal.jpg

Olivine - olive green

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Garnet - mostly pink, orange or red.

quartz.jpg

Quartz - transparent

mica crystal.JPG

Mica/Muscovite - transparent flakes

hornblende crystal.jpg

Hornblende - shiny black

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Feldspar - pink, white or red

pyroxene.jpg

Pyroxene - dark black

plagioclase.jpg

Plagioclase - white

magnetite.jpg

Magnetite - dark grey-black

epidote.jpg

Epidote - lime green

biotite.jpg

Mica/Biotite - shiny black flakes

hematite.jpg

Hematite - reddish brown; often seen as

brown stains on other rocks.

Colours of Quartz...

Quartz occurs in many colours. The colours are caused by traces of different elements. Here are some examples...


purple amethysts.jpg
rose quartz.jpg
citrine.jpg
rock crystal.jpg

AmethystElement: Manganese
Rose QuartzElements: Titanium or Manganese
CitrineElement: Iron
Rock CrystalColourless - No trace of elements

All about crystals:
mineralogy for kids.pngFor Senior students...====Click the picture to discover all about crystals...====
or visit Crystal City

dodecahedron2.jpg


Click the dodecahedronto make a paper garnet crystal.
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Click the book cover to see the amazing sand

grain micro-photography of Dr. Gary Greenberg.

sand atlas2.jpg Click the image to explore the Sand Atlas
crystalshapes250pix.jpgClick the image to print out the templates to====cut-and assemble your own mineral crystal shapes.====
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Click on the image to grow your own crystals
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Build a calcite crystal out of polystyrene balls.In this model: CaCO³Calcium (Ca) - whiteCarbon (C) - blackOxygen (O) - red
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Click image to "Make Five"A Chemical Formula Game
6opal023.jpgWhat is a Crystal?Click Opal's Pals to find out...
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Fluorite
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Go Microfossil-huntingin the North Otago Greensand...

Microfossils to look for in the North Otago Greensand Sample...

Look for skeleton fragments of foraminifera, ostracods, and coccoliths which sunk to the sea floor 25 million years ago.

The green-blue colour of the sand is caused by the green clay mineral glauconite.

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Handy tip...

Most of the fossils are broken into tiny pieces - search for bits of skeleton which help you

to identify the whole organism.

You willl find them more easily if you use the dinolite microscope at its 200X magnification.


coccolith.jpg
ostracods3.jpg
forams.jpg

Coccoliths are tiny round, plates of calcium

carbonate, arranged in a circle and part of

the bodies of single-celled algae.

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Ostracods are tiny seed shrimps with their bodies

enclosed in a bivalve shell.

Foramenifera ("hole-bearers") or forams for short,

are tiny single-celled animals with intricate shells

made up of chambers, each chamber linked by a hole.



2012
Inuktitut - The Language of the Inuit
Aurora - Paintings in the Sky
Transit of Venus
Flight

2011
Chess
Aqua Vision - Creative Dance
Catapults and the Siege of Masada
Shell Collections - Linnaeus, Latin, Spirals, Fibonacci and Mondrian

2010
Cooking with Sunshine - Pizza box ovens
Celebrating Flowers
Oceans - Nudibranchs
Iqbal - Respecting Human Rights
Antarctica Mysteries
Snowflakes
Light Fantastic
Feathers
Crystals

2009
Engines - Pistons
Colour in Art
Alien Moon Base
Cultural Connections
Gardens in a Bottle and Gardens in the Mind
Bones, Skulls and Georgia O'Keeffe

2008
Rocks and Fossils
I-Mag 2008 - Sticks and String
China
Lanterns, Guernica and Pablo Picasso
Fairground Physics and Fernand Leger
Space, Hubble and Vincent Van Gogh
The Roswell Incident
Healthy Eating, Atoms and Arcimboldo
Oceans, LOGO and Hydrothermal Vents
I-mag Rolled Newspaper Challenge Flight
Paper Flowers and Diego Rivera Needs and Wants
Snow Crystals
Iceman Mystery
North American Indians
Recycling
Minibeasts
Forces and Energy