Aug 24 (Reuters) - Gold prices fell slightly on Tuesday, although they hovered above the key psychological level of $1,800 on expectations that the U.S. Federal Reserve might delay cutting back its stimulus amid rising cases of the Delta coronavirus variant.

FUNDAMENTALS

* Spot gold eased 0.2% to $1,801.78 per ounce by 0100 GMT, having jumped about 1.4% in the previous session.

* U.S. gold futures were little changed at $1,804.90.

* The dollar index clawed higher after falling about 0.6% on Monday.

* Data from IHS Markit showed U.S. business activity growth slowed for a third straight month in August as capacity constraints, supply shortages and the rapidly spreading Delta variant weakened the momentum of the rebound from last year's pandemic-induced recession.

* Investors are now focused on Fed Chair Jerome Powell's speech at the annual Jackson Hole, Wyoming, symposium awaiting guidance on the U.S. central bank's taper plans.

* Britain's post-lockdown economic rebound slowed sharply in August as companies struggled with unprecedented shortages of staff and materials, though strong inflation pressures cooled a bit, a survey showed on Monday.

* SPDR Gold Trust, the world's largest gold-backed exchange-traded fund, said its holdings fell 0.5% to 1,006.66 tonnes on Monday from 1,011.61 tonnes on Friday.

* Silver fell 0.5% to $23.54 per ounce, while platinum edged 0.3% higher to $1,015.92.

* Palladium was steady at $2,401.13, having risen 5.5% in the previous session.

DATA/EVENTS (GMT) 0600 Germany GDP Detailed QQ SA Q2 0600 Germany GDP Detailed YY NSA Q2 1400 US New Home Sales-Units July (Reporting by Eileen Soreng in Bengaluru; editing by Uttaresh.V)