Elbert a king (50 résultats)

Etat : New.

paperback. Etat : Very Good. Connecting readers with great books since 1972! Used books may not include companion materials, and may have some shelf wear or limited writing. We ship orders daily and Customer Service is our top priority.

Soft cover. Etat : Good. ORIGINAL 1961 PUBLICATION; softcover; ex-library; light foxing of inside covers, endpages and several leaves; otherwise in good condition. Book.

Etat : Good. 1st. Former library copy. Pages intact with minimal writing/highlighting. The binding may be loose and creased. Dust jackets/supplements are not included. Includes library markings. Stock photo provided. Product includes identifying sticker. Better World Books: Buy Books. Do Good.

Etat : As New. Unread book in perfect condition.

Etat : New.

Etat : New.

Etat : New.

Paperback or Softback. Etat : New. Texas Gemstones. Book.

Etat : New.

Soft cover. Etat : Very Good. VG in pale blue, stapled wrappers, as issued. 42 pp. Fourth printing. B & W photos, diagrams, tables. Covers sunned, especially along edges and spine. Front cover has one small spot of soiling and small rectangular spot with glue residue where price label was removed.

No Binding. Etat : Good. ORIGINAL Abstracts, disbound from GCAGS Transactions volume; no covers; in very good condition. Journal.

PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000.

Etat : As New. Unread book in perfect condition.

Softcover. Etat : Bon. Edition 2023. Ammareal reverse jusqu'à 15% du prix net de cet article à des organisations caritatives. ENGLISH DESCRIPTION Book Condition: Used, Good. Edition 2023. Ammareal gives back up to 15% of this item's net price to charity organizations.

PAP. Etat : New. New Book. Shipped from UK. Established seller since 2000.

Soft cover. Etat : Fine. Later Printing. Blue wrappers, stapled binding, 42 pp., 6 plates and numerous text illustrations. 5th printing. Excellent condition.

Paperback. Etat : Very Good. Sorry, No international shipping on this item.Ex-library paperback in very nice condition with the usual markings and attachments. little cover wear with creases. Text block clean and unmarked. Tight binding.

Soft cover. Etat : Near Fine. 5th printing. 34pp plus plates. Very slight wear, near fine.

Etat : New. In English.

Etat : New. In English.

Stiff pr. wraps. Etat : Good. 42pp, photos, illus, index, stiff pr. wraps nice.

Etat : New.

Etat : New.

Etat : As New. Unread book in perfect condition.

Etat : As New. Unread book in perfect condition.

Hardcover. Etat : Very Good. No Dust Jacket. Book is clean and tight. Hardbound copies of Texas Gemstones, 1961 and Texas Rocks and Minerals 1964 in one book. Ex-library just a few stamps inside and none on outside.; Guidebook #6; Ex-Library; 8vo 8" - 9" tall.

Hardcover. Etat : Good. No Jacket. E1 - A hardcover book in good condition that has some bumped corners and dents, lightly cocked, wrinkling on the spine edges, some scattered scartches, rubbing, scuffing, and bubbling on the cover, lightly moisture soiled, lgiht discoloration and shelf wear with no dust jacket. 9.75"x6.75", 377 pages. Satisfaction Guaranteed. A chondrule (from Ancient Greek chondros, grain) is a round grain found in a chondrite. Chondrules form as molten or partially molten droplets in space before being accreted to their parent asteroids. Because chondrites represent one of the oldest solid materials within the Solar System and are believed to be the building blocks of the planetary system, it follows that an understanding of the formation of chondrules is important to understand the initial development of the planetary system. Most chondrules are composed primarily of the silicate minerals olivine and pyroxene, surrounded by feldspathic material that may either be glassy or crystalline. Small amounts of other minerals are often present, including Fe sulfide (troilite), metallic Fe-Ni, oxides such as chromite, and phosphates such as merrillite. Less common types of chondrules may be dominantly composed of feldspathic material (again either glassy or crystalline), silica, or metallic Fe-Ni and sulfides. Chondrules display a wide variety of textures, which can be seen when the chondrule is sliced open and polished. Some show textural evidence for extremely rapid cooling from a molten or nearly completely molten state. Pyroxene-rich chondrules that contain extremely fine-grained, swirling masses of fibrous crystals only a few micrometers in size or smaller are called cryptocrystalline chondrules. When the pyroxene fibers are coarser, they may appear to radiate from a single nucleation site on the surface, forming a radial or excentroradial texture. Olivine-rich chondrules may contain parallel plates of that mineral, surrounded by a continuous shell of olivine and containing feldspathic glass between the plates; these are known as barred textures. Other observed textural features that are clearly the result of very rapid cooling are dendritic and hopper-shaped olivine grains, and chondrules that are composed entirely of glass. More commonly, chondrules display what is known as a porphyritic texture. In these, grains of olivine and/or pyroxene are equidimensional and sometimes euhedral. They are named on the basis of the dominant mineral, i.e. porphyritic olivine (PO), porphyritic pyroxene (PP), and porphyritic olivine-pyroxene (POP). It seems likely that these chondrules cooled more slowly than those with radial or barred textures, however they still may have solidified in a matter of hours. The composition of olivine and pyroxene in chondrules varies widely, although the range is usually narrow within any single chondrule. Some chondrules contain very little iron oxide (FeO), resulting in olivine and pyroxene that are close to forsterite (Mg2SiO4) and enstatite (MgSiO3) in composition. These are commonly called Type I chondrules by scientists, and often contain large amounts of metallic Fe. Other chondrules formed under more oxidizing conditions and contain olivine and pyroxene with large amounts of FeO (e.g., olivine with the formula (Mg,Fe)2SiO4). Such chondrules are called Type II. Most chondrites contain both Type I and Type II chondrules mixed together, including those with both porphyritic and nonporphyritic textures, although there are exceptions to this. Size: 8vo - over 7¾" - 9¾" tall.…

Etat : New. Print on Demand.

Taschenbuch. Etat : Neu. Neuware - Delve into the fascinating world beneath your feet with 'Texas Gemstones' by Elbert A. King, Jr. This comprehensive guide explores the diverse and beautiful minerals found throughout the state of Texas. Discover the geological wonders that create these precious stones, from agate to quartz and beyond. Explore the science of mineralogy and geology as you learn to identify and appreciate the unique characteristics of Texas gemstones. Whether you're a rock hound, a student of earth sciences, or simply curious about the natural treasures hidden in Texas soil, this book offers a wealth of information. A timeless classic on the subject of Texas's geological bounty, this book provides insights into the formation, identification, and significance of the state's remarkable rocks and minerals.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.…