Precious Metals and Purity Standards - TSV

code	slug	name	description	atomicNumber	chemicalSymbol	colors	purityStandards
AU	gold	Gold	The most valuable precious metal, with purity expressed in karats (24 parts).	79	Au	[{"name":"Yellow Gold","alloy":"Silver, Copper","description":"Classic warm yellow appearance"},{"name":"White Gold","alloy":"Palladium, Nickel, Zinc","description":"Silvery-white appearance, often rhodium plated"},{"name":"Rose Gold","alloy":"Copper (higher ratio)","description":"Pinkish-copper tone"}]	[{"mark":"K24 / 999 / 999.9","fineness":999,"percentage":99.9,"description":"Pure gold / 24 karat. Highest purity, used for bullion and investment."},{"mark":"K22 / 916","fineness":916,"percentage":91.6,"description":"22 karat. Widely used in traditional jewelry in India and the Middle East."},{"mark":"K20 / 835","fineness":835,"percentage":83.5,"description":"20 karat. Traditional European standard, less common today."},{"mark":"K18 / 750","fineness":750,"percentage":75,"description":"18 karat. Most common for jewelry. Good balance of hardness and beauty."},{"mark":"K14 / 585","fineness":585,"percentage":58.5,"description":"14 karat. Common in Europe and America. More affordable than K18 in Japan."},{"mark":"K12 / 500","fineness":500,"percentage":50,"description":"12 karat. Minimum purity for jewelry in Japan."},{"mark":"K10 / 416","fineness":416,"percentage":41.6,"description":"10 karat. Common in the USA. May not be recognized as precious metal in Japan."},{"mark":"K9 / 375","fineness":375,"percentage":37.5,"description":"9 karat. Common minimum standard in UK and Europe."}]
AG	silver	Silver	Purity expressed in millesimal fineness, with SV925 being the most common standard.	47	Ag		[{"mark":"SV1000 / Ag999 / Ag1000","fineness":999,"percentage":99.9,"description":"Fine silver. Used for bullion and crafts. Very soft."},{"mark":"SV950","fineness":950,"percentage":95,"description":"Britannia silver. High purity silver used in the UK."},{"mark":"SV925","fineness":925,"percentage":92.5,"description":"Sterling silver. Most common standard for jewelry and tableware."},{"mark":"SV900","fineness":900,"percentage":90,"description":"Coin silver. Used in old silver coins and some jewelry."},{"mark":"SV800","fineness":800,"percentage":80,"description":"Common European standard. Used for tableware and decorative items."}]
PT	platinum	Platinum	Highly rare precious metal with purity expressed in millesimal fineness. Pt900 is common.	78	Pt		[{"mark":"Pt1000 / Pt999","fineness":999,"percentage":99.9,"description":"Pure platinum. Used for bullion and industrial applications."},{"mark":"Pt950","fineness":950,"percentage":95,"description":"High purity platinum. Widely used for engagement and wedding rings."},{"mark":"Pt900","fineness":900,"percentage":90,"description":"Most common for Japanese jewelry. Good balance of hardness and luster."},{"mark":"Pt850","fineness":850,"percentage":85,"description":"Minimum purity recognized as precious metal in Japan."},{"mark":"Pt500","fineness":500,"percentage":50,"description":"Minimum purity recognized in the UK."}]
PD	palladium	Palladium	Platinum group element with a white luster similar to platinum.	46	Pd		[{"mark":"Pd1000 / Pd999","fineness":999,"percentage":99.9,"description":"Pure palladium. Used for bullion and industrial applications."},{"mark":"Pd950","fineness":950,"percentage":95,"description":"Most common for jewelry. Elegant luster similar to platinum."},{"mark":"Pd900","fineness":900,"percentage":90,"description":"Common purity for Japanese jewelry and accessories."},{"mark":"Pd500","fineness":500,"percentage":50,"description":"Minimum purity recognized in the UK."}]
RH	rhodium	Rhodium	Platinum group element primarily used for plating applications.	45	Rh		[{"mark":"Rh","fineness":999,"percentage":99.9,"description":"Pure rhodium. Used for plating applications."}]
IR	iridium	Iridium	The densest platinum group element.	77	Ir		[]
RU	ruthenium	Ruthenium	Platinum group element widely used in industrial applications.	44	Ru		[]
OS	osmium	Osmium	One of the densest elements, used in industrial applications.	76	Os		[]