* Platinum tumbles 5 percent
* Gold down 1 percent as rally falters
SINGAPORE, Aug 19 (Reuters) - Platinum tumbled more than 5 percent on Tuesday to its lowest since mid-September, on falling demand from automakers and general weakness in precious metals that saw gold slip back below $800.
Gold's fall after rising more than 1 percent in New York shows the metal remains vulnerable to dollar gains. Silver and palladium also dropped.
Spot platinum <XPT=> dropped to $1,313.00/1,333 an ounce from $1,386/1,406 an ounce late in New York on Tuesday, with falls in Japanese futures adding to the selling pressure.
"From the charts, platinum seemed to have returned the premiums from the earlier South Africa crisis and in fact we are almost at 1-year lows. I am looking at the $1,200-$1,250 regions for support now," said Adrian Koh, analyst at Phillip Futures.
"Looks like a bad week for precious metals," he said.
Platinum powered to a record high at $2,290 an ounce in March after a power shortage in main producer South Africa disrupted mining and triggered supply worries.
But it has lost most of the gains to profit taking, and a slowing U.S. economy that has raised fears of falling demand for autocatalysts, the major use for the metal.
Gold <XAU=> fell to $790.50/792.50 an ounce from $799.65/801.05 late in New York on Monday, when it briefly regained $800 in a technical rebound, after falling to its lowest level in nine months around $773 an ounce last week
Gold was well below a lifetime high of $1,030.80 hit in March.
"General sentiment for gold remains weak and I guess we are likely to see more selling on strength. For near-term support, I am currently looking at the $770 region," said Koh of Phillip Futures.
"If we move below that, then the $750s will be a very important level to look at," he said.
The dollar barely budged against a basket of currencies on Tuesday, taking a break from its sharp two-week surge as investors kept an eye on commodity prices for any further drop that could boost the greenback. [
]Gold futures for December delivery <GCZ8> on the COMEX division of the New York Mercantile Exchange fell $9.1 an ounce to $796.60.
Spot palladium <XPD=> fell to $274.00/279.00 an ounce from $283.00/291.00 an ounce. Silver <XAG=> edged down to $12.90/12.96 an ounce from $13.07/13.13 an ounce.
The most active Tokyo platinum contract for June 2009 delivery <0#JPL:> on the Tokyo Commodity Exchange ended the morning session 264 yen per gram lower at 4,591 yen. Precious metals prices at 0212 GMT Metal Last Change Pct chg YTD pct chg Turnover Spot Gold 790.25 -8.30 -1.04 -5.10 Spot Silver 12.91 -0.27 -2.05 -12.59 Spot Platinum 1316.00 -67.00 -4.84 -13.42 Spot Palladium 274.00 -16.00 -5.52 -25.54 TOCOM Gold 2804.00 -29.00 -1.02 -8.37 29813 TOCOM Platinum 4591.00 -264.00 -5.44 -14.01 20598 TOCOM Silver 460.40 -4.90 -1.05 -14.90 621 TOCOM Palladium 980.00 -38.00 -3.73 -27.46 895 Euro/Dollar 1.4681 Dollar/Yen 109.80 TOCOM prices in yen per gram, except TOCOM silver which is priced in yen per 10 grams. Spot prices in $ per ounce. (Reporting by Lewa Pardomuan; Editing by Michael Urquhart)