Abstract: A lapidary saw is provided including a flat rotary blade having a circular peripheral cutting edge with the blade supported for rotation in an up-sawing angular direction for cutting a stone at a cutting station with an upward sweep of the saw. A bottom portion of the blade is continuously immersed in coolant contained within a reservoir, and a shroud is mounted to enclose a peripheral portion of the saw blade in underlying adjacent relation to the cutting station for positively discharging coolant, upon blade rotation, from an upper end of the shroud directly into the cut being made in the stone by the saw blade.

Abstract: A three-way vise of this invention includes a pair of workpiece clamping jaws mounted on a frame in substantially perpendicular relation to one another, and a pivotable clamping jaw is supported on the frame for applying a clamping force onto the workpiece in a direction angularly inclined to the other jaws. An adjustable jaw pressing device is provided for selectively urging the pivotable clamping jaw into engagement with the workpiece with increased clamping force after the three jaws are initially engaged with the workpiece.

Abstract: A gemstone faceting machine for properly orienting a gemstone for forming facets thereon in a plurality of coaxial rows with equal spacing of the facets in the rows. A dop stick is provided on the end of a faceting shaft secured in a quill sleeve rotatably mounted in a faceting head (which can be angularly adjusted for different facet rows to be formed). A spring-biased detent trigger is pivoted on the bracket to engage between the teeth of an indexing gear secured on a collar on the quill sleeve near the other end of the shaft. A positioning pin is secured to the collar and projects through the gear. A guide disc having evenly spaced peripheral notches is engaged around and can be rotated on a flanged bushing threadably engaged on the quill sleeve adjacent the gear, and a coil spring is provided on the bushing, urging the disc toward the gear. The disc has respective holes spaced to receive the pin to establish the angular relationship between the successive rows of evenly spaced facets.