** WA Kaolin WAK.AX jumps as much as 15% to A$0.046, highest since May 14
** Stock set for best day since April 29
** Mineral extraction firm posts record sales of 4,677 tons in June worth ~A$1 mln ($663,065)
** Says forward orders as of July 1 are 12,911 tons, of which 5,562 tons are expected to be delivered in July
** Stock sees busiest trading session since March 27, with ~719,700 shares traded - ~10x the 30-day average
** WAK last up 10%, trims YTD losses to 7%
($1 = A$1.5232)
(Reporting by Keshav Singh Chundawat in Bengaluru)
((Keshav.SinghChundawat@thomsonreuters.com))