just the same as any where eles
333 gold is the equivalent of 9kt. gold stamped mostly inside rings from Europe.
carat is a weight measurement for gemstones, and karat (with a k) is a purity measure for gold. A nine carat stone would be pretty large. 9kt gold is used in jewelry in Germany, England, Australia, New Zealand and a few other countries. Gold is measured out of 24 parts (with 24kt being pure gold). 9kt is 9 out of 24 parts gold, or 37.5% gold. The rest is other alloys. 9kt jewelry can also be stamped 375 or 333.
WHAT IS KARAT GOLD? Pure gold is called 24k. In numerical terms, this would be 0.999 fine gold. Numerical terms are also used to show the karat of gold in the international trade. Karat simply shows the amount of pure gold in the recipe used to make gold for jewelry. For instance, 9kt gold is 9 parts pure gold out of 24 parts in total. So, 9kt is numerically 9/24 or 0.375. If marked in the jewelry with a number instead of a kt mark, the mark would be 375. Generally, 9kt is characteristic of British jewelry and of countries connected with Great Britain. The Brits are picky about jewelry markings and place a series of marks on jewelry, including date, assay office and quality (karat) of the item. Karat gold is gold generally of less than pure or 24kt. Pure gold is simply too soft for jewelry wear and a recipe is used to make the various karats from 18kt to 9kt. The recipe includes pure gold and a mix of copper and silver primarily. For white gold, nickel or palladium is added. The other metals are added to make the gold hard enough for jewelry usage while still workable by the jewelry manufacturer. In a nutshell, karat simply shows how much pure gold is in the metal of which the jewelry is made. If you consider 18kt gold, this is 18/24 or 750, the same as 75% pure gold. Nine karat gold is 37.5% pure gold. HARDNESS AND DURABILITY. The metals added to pure gold to make karat gold for jewelry change the character of the metal. 9 kt has more copper than 18kt for instance. This will make 9kt a harder metal. This added copper will also make 9kt more prone to tarnish than 18kt gold. The tarnish is mostly seen as a dull look and a loss to some extent of the "yellow" color. Still, if the tarnish forms, it is easily removed with a good polishing cloth or by a quick buff by a jeweler.
545 is the purity of the gold. Usually 14kt gold jewelry is around 545/1000 pure gold. There are around 5 different purity levels associated with 9kt, 10kt, 12kt, 14kt, 18kt, 24kt A 24kt ring may say 24kt *999 vi A14kt bracelet may say 14kt *545 etc.
The KY you are taking about is actually KT which means Karat so 14KT is a type of gold purity scale with 24KT (999) being the purest gold and 9KT the most impure. KY stands for the Karat of Yellow gold specifically, just as KW is for White gold.
no
9ct (or 9kt, in the US) refers to the carat (or karat) content of gold jewelry, each karat being 1/24 of the whole by weight -- so 9kt gold is 9/24 gold and 15/24 other alloying metals, usually silver, copper, and a few others to modify color and/or hardness / workability / durability. 14kt gold is 14/24 gold, and 18kt is 18/24 gold, etc. Gold is much too soft in its pure form to be very durable in jewelry. Note that jewelry must be at least 10kt to be called "gold" in the US, but may be 9ct in the UK. Those who have sensitive skin may need to keep to at least 18kt gold in rings and earrings.
In general, 9 karat gold is actually harder than 22 karat gold. If a piece of jewelry is made from 9kt gold, that means it is 9/24 parts pure gold, and 15/24 parts alloy. In comparison, 22 kt gold is 22/24 parts pure gold. Since gold is a very soft metal, the higher the gold component, generally the softer the metal.
People in Brazil use gold in much the same way as the rest of the world. It is used as a precious metal for crafts like jewelry. It is also considered a valuable metal with high intrinsic value.
9ct gold will have a '375' or '9ct' or '9kt' stamped onto it somewhere, gold plated gold won't have this.
9kt is the proper abbreviation it is often misspelled. 9kt is often referred to as Mexican, Chinese, and European gold. no gold is cheap right now look out for scammers.
Pure gold is 24kt (kt = karat or carat) so 9kt would be 9/24 pure. The rest is base metal alloy such as copper, or possibly semi-precious metal such as silver.