diamond - carat, glasses - ?

DIOPTRE
WordClue
GEMdiamond or sapphire
FOODcarat - diamond, calorie - ?
UNITcarat or gallon
CARATglasses - dioptre, diamond - ?
CORPSmilitary unit size
CURIEnon-SI unit of radioactivity
FARADunit of capacitance
HERTZSI unit for frequency
JEWELdiamond or sapphire
MONTHunit of time dividing the year
OUNCEunit of mass
PENNYunit of currency in various countries
QUARTunit of volume
ZOBELdiamond
CALORIEdiamond - carat, food - ?
DIAMONDdioptre - glasses, carat - ?
GLASSEScarat - diamond, dioptre - ?
GOGGLESsafety glasses
RHINESTONEartificial diamond, strass
SPECTACLESglasses
CALORIEdiamond - carat, food - ?
JEWELdiamond or emerald