Madagascar Tourmaline

Written by Alain Darbellay GGGems

© 2004 All rights reserved. (Na, Li,Ca) (Fe2, Mg, Mn, Al)3 Al6 I(OH)4 I (BO3)3ISi6O18I · Crystallographic properties: Trigonal. Hardness 7 - 7.5 Density 3.02 to 3.26 Refractive index: 1.62 - 1.64 · Chemical Properties: Alumina borosilicate with fluorine. Occurences: Inrepparttar acid magmatic rocks and associated pegmatites, limestones and schists, placers. Coloured tourmalines are related to sodolithic pegmatites. One distinguishes two principal types of tourmalines:repparttar 109293 hexagonal type andrepparttar 109294 triangular one. · The hexagonal type is especially characterized byrepparttar 109295 presence, inrepparttar 109296 prismatic zone, of repparttar 109297 well developed S1 faces, and those of L always narrow. Whenrepparttar 109298 crystals Bi-terminated, one finds withrepparttar 109299 one ofrepparttar 109300 ends ofrepparttar 109301 ternary axisrepparttar 109302 rhomboedron R, and withrepparttar 109303 other samerepparttar 109304 rhomboedron combined with that (0111) = P. · The triangular type, here is never finished atrepparttar 109305 two ends, it is characterized byrepparttar 109306 prevalence of faces I inrepparttar 109307 prismatic zone, while those S are very narrow just as those S2 which accompany them. The crystals onrepparttar 109308 finished end carryrepparttar 109309 base C, combined with repparttar 109310 rhomboedron R; inrepparttar 109311 same way sometimes withrepparttar 109312 rhomboedron P andrepparttar 109313 base C 1 2 3 4 Fig. 1& 2 : Triangular type Fig. 3 & 4 :Hexagonal type Very rare type of Rubellite from Antsongombato tourmaline: white head and red body. 5 6 Crystal ofrepparttar 109314 hexagonal type finished Polychrome tourmaline being in Tsilaizina, Madagascar. at a peak frequently found in Tsilaisina. Liddicoatite Tourmaline Deep-PinkTourmaline Blue-greenTourmaline. Indigolite from Anjanabonoina. Antsongombato type. ( Kunar valley, Afghanistan.) · Colors of tourmalines: Blue is due to bivalent iron, (magnesium gives a clearer blue)repparttar 109315 manganese produce tone

Learning Spanish Grammar and the verb "Gustar"

Written by Patrick Jackson

Learning Spanish Grammar andrepparttar Verb "Gustar"

by Patrick Jackson © Patrick Jackson - All Rights Reserved 2004 =================================== Learning Spanish Grammar andrepparttar 109292 Verb "Gustar"

If there's one verb that gave me a lot of trouble when I first started learning Spanish grammar that verb was "gustar." Many ofrepparttar 109293 Spanish lessons and Spanish classes that I took in order to learn Spanish only confused me even more aboutrepparttar 109294 use of "gustar." "Gustar" means "to be pleasing to" or "to find pleasant." But in many instances, Spanish speakers use itrepparttar 109295 same way that we userepparttar 109296 verb "to like." For example, in Spanish you don't literally say: "I likerepparttar 109297 dog."

In Spanish you would say: "Me gusta el perro".

That literally means "the dog is pleasing to me." Actually, it means "it pleases merepparttar 109298 dog."

It may sound strange to your English-hearing ears. But you will get used to it. Let's try it.

I likerepparttar 109299 house. Me gusta la casa.

I don't likerepparttar 109300 car. No me gusta el carro.

You likerepparttar 109301 table. Te gusta la mesa.

He likesrepparttar 109302 screen/monitor. Le gusta la pantalla. We likerepparttar 109303 bridge. Nos gusta el puente.

They like to lie. Les gusta mentir.

If you want to say "I likerepparttar 109304 dogs," a couple of changes have to take place. Can you guess what those changes are? Of course dog ("perro") must now become plural ("perros"). Butrepparttar 109305 article ("el") must also become plural ("los"). Andrepparttar 109306 verb must change from third person singular ("gusta") to third person plural ('gustan").

Let's try it:

I likerepparttar 109307 dogs. Me gustan los perros.

You likerepparttar 109308 lakes Te gustan los lagos.

She likesrepparttar 109309 streams Le gustan los arroyos.

We likerepparttar 109310 rivers. Nos gustan los ríos.

They likerepparttar 109311 waterfalls. Les gustan las cataratas.

The following isrepparttar 109312 manner that we add clarity or emphasis, or mentionrepparttar 109313 name ofrepparttar 109314 person or persons thatrepparttar 109315 object is pleasing to.

A Carlos le gusta nadar. Carlos likes to swim.

A mí me gusta la playa. I likerepparttar 109316 beach.

A ti te gusta la orilla del mar. You likerepparttar 109317 seashore.

Cont'd on page 2 ==> © 2005
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