Picasso Stone

Macro photograph of patterns in a Picasso stone slab; named 'Picasso' for the brush stroke-like lines; a type of marble from Utah Image # 3355 4682 X 5740 pixels

Whitcomb Creek Geode

Macro photograph of patterns in a Whitcomb Creek geode from Oregon; a geode is a stone nodule with an inner cavity filled with crystals or mineral matter Image #3290 3200 X 4678 pixles (3.74 MB)

Baker Ranch Thunderegg, close up

Macro photograph of the agate and quartz structural detail in a Baker Ranch thunderegg from New Mexico Image #4162 4080 X 6144 pixels (7.42 MB)

Malachite

Macrophotograph of a cross-sectioned and polished malachite stalactite from the Democratic Republic of the Congo. Malachite is a copper based mineral. Image #4106 6058 X 3686 pixels 6058 X 3686

Labradorite

Macro photograph of a piece of labradorite (a member of the feldspar group of minerals); from Maniry, Madagascar Image #2573 3200 X 4800 pixels

Amethyst Crystals

Extreme macro photograph of amethyst from the Purple Haze mine near Thunder Bay, Ontario, Canada. The red coloration is due to the presence of hematite inclusions. Image #3015 4699 X 3092 pixels

Baker Ranch Thunderegg, close up

Macro photograph of the agate and quartz structural detail in a Baker Ranch thunderegg from New Mexico Image #4163 3969 X 6144 pixels (7.50 MB)

Rolling Hills Dolomite

Macro photograph of a sliced and polished piece of Rolling Hills dolomite; from Chihuahua, Mexico Image #3679 4080 X 6144 pixels

Amethyst

Macrophotograph of the mineral amethyst (Silicon dioxide); a form of quartz that came to be a symbol of celibacy in the Middle Ages; found in Uruguay. Image #2286

'Mexican Coconut' Geode

Mineral (agate and quartz) patterns in a cut and polished Mexican Coconut geode; Mexico Image #3832 3200 X 4800

Fluorite mineral, closeup

Macro photograph of a slab of fluorite (calcium fluoride) from the Jiangxi Province in China Image #2508 4800 X 3200 pixels

Fluorite Mineral

Macro photograph of a slab of fluorite (calcium fluoride) from the Jiangxi Province in China Image #2511 3200 X 4800 pixels

Birds Eye Rhyolite

Macro photograph of the detail in a piece of Birds Eye rhyolite; a rock of volcanic origin Image #2848 4734 X 3132 pixels

Pietersite Gemstone

Macrophotograph of the structural detail in a pietersite gemstone from Arizona. Also known as 'Arizona tiger eye' it is a variety of chalcedony that contains amphibole mineral fibers that result in a chatoyant (optical reflectance) effect. 4696 X 3200 pixels (4.96 MB)

Pink Opal

Macrophotograph of the colors and patterns in a cut and polished slab of brecciated pink opal. An opalised radiolarite from Western Australia. Radiolarite is a sedimentary rock composed primarily of the microscopic skeletal remains of radiolara protozoa. Image #3849 5803 X 2659 pixels

Chevron Amethyst Mineral

A combination of purple amethyst and white quartz; Africa Image #3830 3721 X 5979 pixels

Azurite

Velvety soft blue masses of azurite are formed from the weathering of copper minerals. Used as a pigment by Renaissance painters. Image #3352 4800 X 3200 pixels

Cactus Quartz/Amethyst

Macrophotograph of a small portion of a Cactus quartz (a.k.a. Spirit quartz) crystal cluster with purple amethyst. (Selective focus to place emphasis on the larger amethyst crystal.) The orange coloration is due to iron oxidation and small iron inclusions can be seen in the matrix of many of the crystals. From the Magaliesberg Mountains of South Africa. Image #4117 3200 X 4800

Wild Horse Magnesite

Macrophotograph of a slab of magnesite (white) and hematite (red) from the Globe Copper Mine in Arizona Image #3908 4800 X 3200 pixels

Rhodochrosite Mineral

Macro photograph of the patterns in a piece of rhodochrosite (Manganese carbonate) from Argentina Image #3486 3200 X 4746 pixels

Serpentinite

Metamorphic rock formed by the serpentine group of minerals; Washington State Image #2556 3200 X 4800 pixels

Rolling Hills Dolomite in Black and White

Macro photograph of the 'rolling hills' in a piece of dolomite from Mexico Image #3678BW 6144 X 4080 pixels

Baker Ranch Thunderegg, close up

Macro photograph of the agate and quartz structural detail in a Baker Ranch thunderegg from New Mexico Image #4160 7360 X 4912 pixels (11.35 MB)