Amethyst may develop into the more common citrine and rarer green quartz naturally under certain geologic conditions. On the California-Nevada border, just north of Reno, amethyst, citrine, and green ...
Natural products are small molecules produced naturally by any organism including primary and secondary metabolites. They include very small molecules, such as urea, and complex structures, such ...
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We think not. With a little knowledge on the best affordable fine jewelry brands, you can find genuine, luxury-grade pieces that fit your budget. The top brands we've tested push past overpriced ...