topaz (- ) (-) , asteriated ~ bohemian ~ , citrinebrazilian ~ 1 2 citrine false ~ gold ~ , hyacinth ~ , - madeyra ~
topazolite -
topped with
torch ,
touchstone
toughness
tourmaline -
tourmaline ( , ), , - black ~ , blue ~ , -
transfer table
transformation stress
transformation temperature
transparency
trapezium cross - cut 45
trapezium step cut 20
treasure
treasury
treat under vacuum ( )
tremolite -
triad ,
trial of the pyx ,
triangle cut
tridymite ,
trillion cut
trillion cut
trim ( )
trimming
trinket , ,
triphane -
triphylite ( ) -,
troy (measure)
troy pound
troy weight
tsavorite
tugtupite ( ) -, -
tumble -
turquoise
turquoise ( ) , -
tuxtlite (-),
twin ,
twin crystal contact ~ penetration ~
twin surface -
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twinkle ,
twinkling
twinkling -
twinned ,
twinning ,
twinning axis
twinning band
twisting ( )
two - coloured
two - high reversing ~ mill -
two - high reversing blooming mill -
U
ulexite
ulexite ( ) , ,
ultimate strength in alloy
ultramarine
ultrasonic wave
unbend ( )
unbender unit
uncoiling unit
uncrystalline ,
underfill -
underfilling ()
unevenness ()
unfaceted
unfinished
ungrease
uniaxial ( )
unique pieces
unit elongation
unit weight ,
unit - cast
unmounted
unoil
unscrambler - -
unshrinkability
unshrinkable
unsolder ( )
unsplit pattern
untwinned
unwinder
upper die
upper girdle facets ( )
upset
upsetting
uruguayan amethyst clusters -
ussingite ( ) - - -
uvarovite -
uvarovite ( ), ,
uvite - , -
V
v & lencianite ()
vacuum
vacuum casting
vacuum chamber -
vacuum degassing
vacuum furnace
vacuum molding - -
vacuum treatment
valency
valuable -
valuables -
value -
valuer -
variscite ( ), -
veils ( )
vein of gold -
veining
veneer - -
Venetian pearl -
vent
vent wire ( )
venus hairstone , -
vera cruz
verdelite (- )
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verdigris ( )
verdite
vermeil ()
vermeil - , ,
vermilite ,
vertical - plunger cold chamber die casting machine -
vertine -
vesuvianite -
vesuvianite ( , , ) , , , , , ,
vibrating table
vibration
vibration compaction
vibrator
violane -
virgin gold -
viridine -
viscosity
viscous - flow
vise -
vishnevite ,
vitreous
vitreous silica
vivianite ( ) , ( , , )
vlasovite ( )
vogesite (- , )
void
voidage
volcanic glass -
volkonskoite , ( )
volume ; fractional void ~ (); pore ~ ; void ~
volume shrinkage
vorobyevite
W
wad
warming
warping
wash gold -
waste
waste ~
waster
wastes
watch -
watch case -
watch chain -
watch key -
watch maker -
watch makers -
watch of local make -
watchface -
watchglass -
watchmaking -
watchstrap
water jacket ()
wavellite ( ) -븭 ,
waviness ( )
wax
waxy ( )
weak sand
wear
wear ~ property
wear ~ tear
wear resistance
web ()
wedding ring -
wedding ring box -
wedding ring sizing machine
wedging ( )
weigher
weighing
weight
weight percentage
welt
Wernerite scapolite
westanite
wetting
whalebone ,
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whet ()
whewellite () ( )
whimsical jewelry
whirling runner
white gold -
willemite ( ), , , , -, -
wiluite ()
wing ()
wiper ( )
wire
wire (gold silver) ( )
wire and sheet roller
wiry ( )
withamite
witherite ( )
wkrdite ( , )
wolframite ( )
wollastonite ( )
woodstone
work of sterling merit -
workability ()
workbench
working -
workmanship -
workshop -
wrap ( )
wrapper ( - )
wrapping ( )
wrinkle
wrist watch -
wulfenite ( )
wulff net
X
xalostocite
xenotime ( ) -,
xonotlite (- ) , -, -
x - ray diamond
xylopal
Y
yakutite ,
yellow
yellow ground
yield point ,
yield stress ,
yielding of crystals
youstone
yuksporite ( - ) -
Z
zafirina
zafiro 1 2 -
zeasite ,
zektzerite ( , ), , , ,
zeolites , , - , , ,
zeuxite
zeylanite