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Crushed stone comes in several grades, and some of the most popular grades are #5, #67, #1, #8, #3, #10, #57 and #411. Crushed stone is used primarily in construction, while homeowners commonly use grade #57 for driveway... More »

The most common size is grade 5 crushed stone, which contains pieces of stone that are typically no larger than 1 inch. Crushed stone grades 57 and 67 are also commonly used for driveways and construction and contain pie... More »

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The standardized gemstone size chart is a chart that provides the average size of a gem according to the weight and shape of the stone. The sizes provided on the chart are an average and vary depending on the specific ty... More »

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Individual diamond prices vary and depend on the characteristics of each stone. Established in the 1940s, the grading system currently in use weighs each stone's color, clarity, cut and carat weight in determining its pr... More »

A diamond's value is determined by cut, color, clarity and carat weight, so the mounting's metal, such as white or yellow gold, may influence the color and appearance of the stone, but not its value. Diamonds are graded ... More »

You can tell whether a diamond is real or fake by looking at certain details of the diamond, such as presence of imperfections, the shape of the edges and the stone’s refractivity. Other tests include the "fog test" and ... More »

Lapis lazuli means blue stone. Lapis is the Latin word for stone, and azula comes from the Arabic language and means blue. Lapis lazuli is the stone of friendship and truth. The deep blue gemstone encourages peaceful rel... More »