Recommended Interesting Articles

Gemstones

Idaho Gemstone Mining

Garnet and opal are Idaho's most important gems, but many others have been produced in the state. Author: Hobart M. King, Ph.D., GIA Graduate Gemologist Idaho Harlequin Opal: Photo of a harlequin opal triplet from the Constellation Mine near Spencer, Idaho. It is 6 millimeters by 4 millimeters in size.
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Minerals

Arsenopyrite

Mineral Properties and Uses Article by: Hobart M. King, Ph.D., RPG Arsenopyrite and milky quartz on limestone from the Smith Vein, Carrock Mine, Caldbeck Fells, Cumberland, Cumbria, England. Specimen is approximately 8.8 x 6.2 x 4.8 centimeters in size. Specimen and photo by Arkenstone / www.iRocks.com.
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Minerals

Carbonado Diamonds

The same hardness, but much tougher than other varieties of diamond. Author: Hobart M. King, Ph.D., GIA Graduate Gemologist Carbonado Diamonds are usually black or gray in color and irregular in shape. Upon close examination, their porous texture is usually obvious. They typically exhibit a luster that might be perceived as glassy, submetallic, or adamantine.
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Minerals

Triboluminescence

Article by: Hobart M. King, Ph.D., RPG Triboluminescence: YouTube video demonstration of triboluminescence. We use two pieces of milky quartz to produce a few flashes of light. You can easily find other minerals that exhibit triboluminescence. About 50% of all crystalline substances exhibit the property [1].
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Maps

New Mexico County Map with County Seat Cities

County Maps for Neighboring States: Arizona Colorado Oklahoma Texas Utah New Mexico on a USA Wall Map New Mexico Delorme Atlas New Mexico on Google Earth The map above is a Landsat satellite image of New Mexico with County boundaries superimposed. We have a more detailed satellite image of New Mexico without County boundaries.
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Maps

Puerto Rico Map and Satellite Image

Puerto Rico Map of Cities, Roads, and Rivers Puerto Rico Municipalities Map Puerto Rico Municipalities 1 Aguadilla 40 Las Piedras 2 Isabela 41 Naguabo 3 Quebradillas 42 Ceiba 4 Camuy 43 Anasco 5 Hatillo 44 Mayaguez 6 Arecibo 45 Las Marias 7 Barceloneta 46 Maricao 8 Florida 47 Adjuntas 9 Manati 48 Jayuya 10 Vega Baja 49 Orocovis 11 Vega Alta 50 Barranquitas 12 Dorado 51 Comerio 13 Toa Baja 52 Cidra 14 Catano 53 San Lorenzo 15 Bayamon 54 Humacao 16 Guaynabo 55 Cabo Rojo 17 San Juan 56 Hormigueros 18 Trujillo Alto 57 San German 19 Carolina 58 Sabana Grande 20 Loiza 59 Lajas 21 Canovanas 60 Guanica 22 Rio Grande 61 Yauco 23 Luquillo 62 Guayanilla 24 Fajardo 63 Penuelas 25 Rincon 64 Ponce 26 Aguada 65 Juana Diaz 27 Moca 66 Villalba 28 San Sebastian 67 Coamo 29 Lares 68 Aibonito 30 Utuado 69 Cayey 31 Ciales 70 Santa Isabel 32 Morovis 71 Salinas 33 Corozal 72 Guayama 34 Toa Alta 73 Arroyo 35 Naranjito 74 Patillas 36 Aguas Buenas 75 Maunabo 37 Caguas 76 Yabucoa 38 Gurabo 77 Vieques 39 Juncos 78 Culebra Puerto Rico Bordering Countries: None Regional Maps: Map of the Caribbean Islands, Map of the United States, Map of North America, World Map Where is Puerto Rico?
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