The use of amber for adornment purpose started around -8000 BC. A simulated form of this gemstone, Albumen amber, has been used since the 1400s. It was invented by Leonardo De Vinci. It is to be noted that not all amber or copal is suitable for making jewelry. This is due to the fact that they have varying properties.

The word amber means brownish yellow, but the gem can be yellow, golden, white, orange to reddish brown, or even bluish or greenish. Baltic amber is generally more expensive than Dominican amber. Pieces containing insect or plant inclusions fetch higher prices than clean pieces without such

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Fundamentals of LEaP. By Pengfei Li and David Cerutti. Background Information. The LEaP program is a portal between many chemical structure file types (.pdb and .mol2, primarily), and the Amber model parameter file types such as .lib, .prepi, parm.dat, and .frcmod).

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Most amber is yellow to orange or brown. Deep yellow colors command higher prices. Natural cherry red pieces are very rare and sell at a premium. However, most red amber undergoes heat treatment to achieve this color. Green Amber. While heat treatments can produce deep green hues, some yellow-green amber occurs naturally.

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AMBER Application • AMBER – Software for analyzing large-scale molecular dynamics (MD) simulation trajectory data – Reads either CHARMM or AMBER style topology/trajectory files as input, and its analysis routines can scale up to thousands of compute cores or hundreds of GPU nodes with either parallel or UNIX file I/O

Amber Tutorials. Here are a number of tutorials prepared by the AMBER developers to help you in learning how to use the AMBER software suite. Clicking on each chapter heading will take you to a new page of abstracts describing each tutorial.

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The color of natural amber can vary considerably as the result of environmental factors when it formed, with yellow accounting for nearly 70 percent of all Baltic amber, and black, blue, green and red considerably rarer. Appraising the value of an amber necklace requires thorough examination and understanding of the marketplace.

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Multi-Grid Image Analysis Standard. A uniquely designed standard with 4 different grid size patterns: 0.5 x 0.5 mm grid with 25 µm pitch; 1.0 x 1.0 mm grid with 50 µm pitch; 2.0 x 2.0 grid with 100 µm pith; and 4.0 x 4.0 mm grid with 200 µm pitch. Also includes a Star Target with 15 degree angle increments.

Amber Jewelry Nature has been inspiring fine jewelry for ages. One of the greatest examples of this is amber. This fossilized resin from prehistoric trees and plants results in an amazing array of shapes, colors and distinctions that jewelry lovers have long coveted.