"Malaysian Jade" is actually dyed quartzite. The name of the country is used to deceive buyers into believing that the stone they are being offered is from a new jade deposit in Malaysia. There is no such deposit. This dyed quartzite was brought into China in the 1980s by Indian and Pakistani traders. It is an unnaturally even, vivid green and is often made into beads and cabochons. Under magnification, it shows a honeycomb effect, as the dye can only penetrate the boundaries of the quartz crystals, forming green borders that are easily seen.
Depending on the dyeing agent used, some stones will show liverish red under the Chelsea Colour Filter. However, some dyes contain copper which will mask the effect under the filter.
Thousands of buyers and retail customers feel victim to this scam when "Malaysian Jade" was first introduced onto the market. Nowadays, consumers are too knowledgeable to be fooled by this unnatural-looking green stone with a colour that really is too good to be true!