Picture Identification Guide for Polished Stones and Tumbled Rocks Provided by
Amazonite is a green microcline feldspar. It is A rare find is fossil coral that has been replaced by Lepidolite is a variety of mica that occurs in a Jasper is an opaque chalcedony and red is one of its named after the Amazon River of South America, agate - or agatized. This type of fossilization often spectrum of colors that range from pink to deep most common colors. This red jasper from South where the first commercial deposits were found. preserves the structure of the coral individual or lavender. The stones shown here are tumbled Africa has a fire-engine red color that in some The stones shown here are a rich green Amazonite colony. The result can be a beautiful stone that can quartz pebbles that have enough lepidolite stones is interrupted by a white to transparent quartz that was mined in Russia. be polished to display cross and lateral sections inclusions to yield pink and lavender gemstones. vein. It often accepts an exceptionally high polish. through the coral fossil.
Apache Tears are round nodules of obsidian that "Crackle Quartz" is a name used for quartz Amethyst is a purple variety of crystalline quartz that Rhodonite is a metamorphic manganese mineral can be transparent through translucent. When it has polish to a beautiful jet black color. If you hold them specimens that have been heat treated and then that is well known for its beautiful pink color. It is dyed to change their color. The heat treatment a soft purple color it is often called "lilac amethyst". up to the light you will see that they are a translucent often found as nodules that are cut by abundant produces fractures in the stone that facilitate the The stones shown here were produced from material to transparent glass. These polished Apache Tears penetration of dyes. mined in South Africa. black veins of other manganese minerals. The were produced from a material found in Arizona material used to produce these stones was mined (USA). in Canada.
Apricot Agate Dalmatian Stone Lodestone Rhodonite - Raspberry
Apricot Agate is a banded agate that is named for its Dalmatian Stone is white to gray jasper with black Lodestone has amazed people for thousands of Raspberry rhodonite is a bright pink variety of the apricot pink or orange color. It is a beautiful material spots. It is given that name because white years because it is a natural magnet. When manganese mineral, rhodonite. It is a metamorphic specimens have a color pattern similar to a with bands of whites, creams, yellows, oranges and suspended on a string, it will orient itself with Earth's mineral with a gemmy pink color that is often Dalmatian dog. Dalmatian Stone is often dyed a pinks. The stones shown here were produced from variety of colors. magnetic field. It has a silver metallic luster and is a interrupted by veins of black manganese oxide. The agate mined in Botswana (Africa). variety of the iron ore magnetite. These specimens specimens shown here were found in Madagascar. were found in the United States.
Amethyst is the name given to transparent to Dumortierite is a bright blue, dark blue or Malachite is a green copper carbonate mineral. It Rose quartz is a transparent to translucent variety translucent purple quartz. It often forms in greenish-blue mineral that is occasionally found in often displays swirled and banded patterns in of crystalline quartz with a soft pink color. It takes alternating bands with white to clear quartz. The metamorphic rocks. It can be polished to a high shades of light through dark green. It is a very heavy a very high polish and is an exceptionally popular resulting material is called Banded Amethyst or sometimes Chevron Amethyst. The Banded luster and is one of just a few blue minerals that are material because of its high copper content. These semiprecious stone. The material used to produce Amethyst used to produce these stones was mined hard enough to be used as a gemstone. The stones stones were produced from malachite mined in Zaire these stones was mined in Namibia (Africa). in Namibia (Africa). shown here were produced from material mined in (Africa). Mozambique (Africa).
Carnelian is a translucent orange to red or brown Agate is a variety of chalcedony that can be Montana Moss is a transparent to translucent agate Zoisite is a mineral that is rarely found in agate. It often forms in alternating bands with white extremely colorful but usually is not. It is slightly with brown and black mossy inclusions. The base metamorphic rocks. Even more rarely it contains chalcedony. The result is known as Banded porous, with some bands and zones being more color ranges from clear through milky to amber bright red corundum crystals (rubies). This bright Carnelian. These stones were produced from an porous than others. When heat treated and exposed orange to pink material mined in Botswana (Africa). to dye, the porous zones absorb more dye than the brown. It is named after the State of Montana where green zoisite mined in Tanzania (Africa) contains less porous, producing a stone that is banded with it is found at many locations and is a popular rough occasional red rubies a few millimeters in diameter. various color intensities. with lapidaries.
Bloodstone Eye Agate Mookaite Snowflake Obsidian
Bloodstone, also known as heliotrope, is a green "Eye agates" are rare agate specimens that have Mookaite is silicified radiolarian siltstone that is Obsidian is a natural volcanic glass that can be jasper splashed with small drops of red. The red perfectly circular markings or "eyes". These are found in Western Australia. Many specimens of polished to a very high luster. Some stones of actually three-dimensional features that extend into Mookaite can accept a very high polish. It is widely drops remind many people of blood and that is the obsidian contain white crystals of the mineral the stone in the shape of a hemisphere. Sometimes known for its spectacular contrasting color patterns source of the name Bloodstone. It has been a cristobalite. When polished these stones produce they have concentric or "bull's eye" color zones. of yellows, creams, reds and maroons. popular stone since Biblical times. The Bloodstone Lake Superior and Botswana agates frequently a gemstone known as snowflake obsidian. shown here was produced from material mined in display eyes. India.
There are very few blue gemstones. Occasionally Fluorite occurs in a variety of colors that frequently Ocean Jasper, sometimes called "orbicular jasper," Blue rocks and minerals are rare and that is what the variety of quartz known as chalcedony occurs in includes purple, green, yellow, blue and clear, that is a silicified rhyolite or tuff that contains "eyes" makes sodalite an interesting mineral. It is an a blue color, such as this blue material mined in are often banded. Although it is beautiful it is not formed from radial quartz and feldspar crystals. It igneous mineral named for its sodium content. It Namibia (Africa). especially well suited for use in jewelry and certain occurs in a variety of colors, but green, yellow, typically occurs in a range of blue hues but white crafts because it has a hardness of four and has white, pink and cream color patterns are very and pink colors are also common. perfect cleavage in four directions. common. The stones shown here were produced from material mined in Madagascar.
Blue Lace Agate is the name given to a chalcedony Granite is an intrusive igneous rock that is composed Quartz naturally occurs in almost every color of the Sunstone is a plagioclase feldspar that contains that consists of alternating bands of white agate and of quartz and feldspar with minor amounts of micas, subtle blue to transparent agate. The result is a lacy amphiboles and other minerals. It can be pink, white spectrum. These colors are caused by impurities in abundant inclusions of platy minerals such as appearance that looks like blue lace. The Blue Lace or gray in color. Although the minerals in granite have the quartz crystal. This gemmy orange quartz in a mica or metals that sparkle in reflected light. This Agate shown here was produced from material found various hardness, it can easily be tumbled into beautiful "peach" color was produced from a mine in sparkling luster is known as aventurescence. These in Namibia (Africa). attractive stones. India. specimens of sunstone were mined in India.
Botswana Agate is a name given to a banded agate Aventurine is a translucent quartz that contains in- Petrified wood forms when plant debris is buried and Tigers Eye receives its name from how reflected found in Botswana (Africa). This agate typically has wonderful white, gray and brown banding - sometimes clusions of platy minerals such as muscovite mica, then replaced by mineral material such as light forms a band that crosses the stone at a right with "eyes" - and takes a very high polish. hematite or goethite. The inclusions interact with chalcedony or opal. This often occurs when a forest angle to linear structures within the stone. Although light entering the stone to produce a glistening is buried under a volcanic ash fall. When polished the most popular Tigers Eye is golden to brown in known as "aventurescence." These light green these pieces of wood often display interesting grain color, it also occurs in other colors such as this deep stones were produced from material found in patterns that can sometimes be linked to a specific blue material found in South Africa. Zimbabwe (Africa). type of plant.
Brecciated Jasper Green Moss Agate Petrified Wood (Arizona) Tigers Eye - Gold
"Breccia" is a rock composed of angular fragments. Moss agate is a translucent to transparent chalced- Petrified wood is found at many localities worldwide. Tigers Eye receives its name from how reflected Brecciated jasper consists of jasper fragments ony that contains visible inclusions with a mossy or The most famous are in the state of Arizona (USA). light forms a band that crosses the stone at a right cemented together with agate or jasper. The dendritic shape. The moss agate shown here has Much of the petrified wood found there is various angle to linear structures within the stone. The Brecciated Jasper shown here is a bright red material dark green inclusions. These stones were produced with white, gray and black markings. These stones from material found in India shades of red without distinctive wood grain. It is Tigers Eye shown here is the popular golden to were produced from material found in South Africa. sometimes found as logs or tree segments. Most is brown colors that are typical for this gemstone. found as small pieces scattered on the surface or in These stones were produced from material found dry washes. in South Africa.
Carnelian Agate Hematite Orthoclase Tigers Eye - Red
Carnelian Agate is a translucent orange to red or Hematite is an iron oxide mineral with a bright red or Orthoclase is a very common mineral of the feldspar The Tigers Eye most often seen is a honey to brown agate. It has been a popular gemstone since silver color. It is has a specific gravity that is about family. It often has a pleasing peach color and soft golden brown color; however, it is sometimes Biblical times. The stones shown here have a bright pearly luster. Surprisingly orthoclase has not double that of the typical gemstone - thus it feels heat-treated to produce the deep reddish color orange color and a very bright polish. They were received the same level of lapidary attention as produced from agate found in Botswana (Africa). very heavy. The hematite shown here has a bright amazonite - another feldspar mineral with an shown in these stones. These stones were produced silver metallic luster. These stones were produced interesting color. It has right angle cleavage and from material found in South Africa. from hematite found in Brazil. often breaks into interesting shapes.
Chrysocolla in Quartz Howlite Picasso Stone Tree Agate
Chrysocolla is a vivid blue to blue-green mineral that Howlite is a silicate mineral found in evaporite "Picasso stone" reminds many people of the inter- Tree agate is a name used for a white chalcedony contains copper. It often forms in intimate association with quartz or chalcedony to yield a durable deposits. It usually has a white or gray color that is esting art style of the famous painter, Pablo Picasso. that has green dendritic markings. It is a very gemstone. Chrysocolla is often found associated with cut by gray to black veins. It is porous and readily It is a beautiful material with angular patterns in popular material used to make beads, cabochons copper deposits much like the mineral turquoise. accepts dye (see below). Its white color allows it to gray, brown, black, cream, white and other colors. and tumbled gemstones. The stones shown here These stones were produced from material mined in accept dye with very predictable color results. These stones were produced from material found in were produced from material mined in Botswana. Namibia (Africa). Utah (USA).
Citrine Quartz Howlite - Dyed Picture Jasper Unakite
Citrine is a variety of transparent to translucent quartz Howlite is one of the most commonly dyed lapidary Picture Jasper is a material marked with colors and Unakite is an igneous rock that contains mostly that ranges in color from a light yellow through orange materials. It is often dyed to produce the bright patterns that look like "landscape" scenes - thus the green epidote and pink orthoclase, but with minor to amber brown. Yellow and golden citrine is colors that are not often found in natural stones. amounts of quartz and other minerals. It is often name "picture jasper." If you study a stone you will especially popular. These stones were produced from Howlite dyed blue is a popular substitute for polished to produce an interesting gemstone. The material found in Brazil. Most citrine quartz is turquoise. often find interesting "pictures" of landscapes and stones shown here were produced from material produced by heat-treating Amethyst. deserts. These stones were produced from material mined in South Africa. found in Namibia (Africa).
Chrysoprase is a pale green to bright green Kambamba Jasper is a fossilized stromatolite (a Aventurine is a quartz with abundant inclusions of Moonstone is the name used for stones of chalcedony that obtains its green color from inclusions of nickel minerals. Citron Chrysoprase is form of colonial algae) that has been mineralized by platy minerals such as mica. The inclusions reflect orthoclase feldspar with a soft pearly luster, the name used for material that is on the pale chert. The Kambamba jasper shown here is a dark and scatter light within the stone to produce a sometimes with adularescence. These white to yellowish side of that color range. The stones here green to black material with circular markings. These glittering phenomenon known as "aventuresence." cream-color stones have a nice pearly luster and were produced from material found in Australia. stones have a very nice polish and were produced The pink stones shown here were produced from bright polish. They were produced from moonstone from material found in Madagascar. material mined in Canada. mined in India.
Clear Quartz Labradorite Pink Botswana Agate White Quartz
Quartz is one of the most abundant minerals in Labradorite is a variety of plagioclase feldspar that "Botswana agate" is the name given to banded White quartz is one of Earth's small number of Earth's crust but clear specimens with very little color often exhibits bright flashes of electric yellow, green and nearly free from inclusions are seldom found. or blue when played in the light. This phenomenon agates produced in the country of Botswana (Africa). ubiquitous minerals - that means it is found almost They are known as "clear quartz" or "rock crystal". is unique to the mineral and has been named Some of these stones occur in a gray through everywhere. Perhaps it is rarely polished because it They capture the light and have a "bright" "labradoresence". It is one of our favorite tumbled creamy pink color. These are known as "Pink is so common that it is overlooked. However, it is a appearance. stones. Botswana." beautiful tumbled stone that works nicely in jewelry and craft projects.
Colored Moonstone Lapis Lazuli Pink Opal Yellow Jasper
Moonstone is the name used for stones of orthoclase Lapis Lazuli is a gemstone that has been popular Pink opal is a variety of common opal that is rarely Yellow Jasper is an opaque yellow to yellow-brown- feldspar with a soft pearly luster, sometimes with adularescence. It occurs in a variety of colors which since Biblical times. Lapis is one of just a few blue seen as a tumbled stone. It can be a beautiful beige chalcedony that can be polished to a very high include: white, cream, pink, brown and gray. These gemstones. It often contains white calcite veins and material even though it lacks the "play of color" luster. These stones, produced from material mined colored moonstones were produced from material sparkles of gold-colored pyrite. The stones shown exhibited by precious opal. These specimens were in South Africa, show some dark brown to cream found in India. here have a bright blue color and were produced mined in Peru, a country that is well known for color zones that produce a scenic pattern. from material mined in Chile. producing pink opal.
Confusionite Leopard Skin Prehnite Yellow Quartz
Confusionite is a material that, at least to the Leopard Skin looks like its name. It is a cream to tan Prehnite is a yellow to green silicate mineral that is Yellow Quartz is a translucent to transparent quartz to pink rhyolite with black, white, red, or tan markings observer, is difficult or impossible to identify. No occasionally found in igneous and metamorphic with a light to deep yellow color. These translucent person who possesses an abundant number of in a color pattern that resembles the fur of a leopard. rocks. The specimens used as gemstones generally stones were produced from material mined in India polished stones should be ashamed to confess that It is a popular gemstone that polishes well. These he cannot identify a significant number. These stones were produced from material mined in Mexico. are transparent to translucent with a pleasing and have a very bright polish. stones can be called "confusionite" to reduce yellow-green color. The stones shown here were embarrassment. produced from material mined in South Africa.
For more information on these samples, visit the website for the Shreveport Geological Society @ SGS1.org or http://rocktumbler.com/polished-stones/