By American standards, fake gold is anything less than 10 karats. If you're wondering if your gold is real, the most reliable way to find out is to take it to a certified jeweler and have it tested. If you want to check for yourself, use these instructions to make that determination.Know More
Gold isn't a magnetic metal, so if it pulls towards or sticks to the magnet, it's fake. However, just because it does not react to the magnet does not mean it's real, as non-magnetic metals are used in counterfeit pieces as well.
A stamp indicates fineness (1-999 or 0.1-0.999) or karat (10K, 14K, 18K, 22K or 24K). A magnifying glass makes this easier to see. An older piece might not have a visible marking due to wear. Counterfeit pieces often have a marking that appears authentic; more testing may be needed either way.
It's important to check for discoloration in areas that face constant friction, typically around the edges. If the gold seems to be wearing off and showing a different metal beneath, you probably have a piece that is only gold plated.
Typically used during an incubation in microbiological laboratory work, a water bath keeps water at a consistent temperature. A water bath can also be used to enable a chemical reaction to occur once the water reaches a certain temperature.Full Answer >
A light microscope uses a focused beam of visible light to magnify objects for observation. It works in a similar way as a refracting telescope but with several minor differences. A telescope uses a large objective lens, because it needs large amounts of light to bring a dim, distant object to a bright focus. On the other hand, a light microscope does not need a large objective lens because it only needs to acquire light from a small area of a thin, close specimen that is well illuminated.Full Answer >
The scientific method is the series of standardized steps that all scientists around the world follow to identify and answer questions. The steps involve identifying an observation, forming a question, creating a premise for the observation, testing the premise and drawing a finding from the results, explains National Park Service.Full Answer >
In chemistry, "GLC" stands for gas-liquid chromatography. Gas-liquid chromatography is a technique used in analytical chemistry for analyzing and separating compounds that can undergo vaporization without decomposition. A typical application of GLC is in testing for purity of substances.Full Answer >