Our chalcedonywas probably included by the ancients among the various kinds of jasper and agate, especially the varieties termed "leucachates" and "cerachates.
Chalcedony has been in all ages the commonest of the stones used by the gem-engraver.
Chalcedony may be regarded as a micro-crystalline form of quartz.
Chalcedony occurs as a secondary mineral in volcanic rocks, representing usually the silica set free by the decomposition of various silicates, and deposited in cracks, forming veins, or in vesicular hollows, forming amygdales.
The surface of chalcedony is occasionally coated with a delicate bluish bloom.
Its occurrence gives the name toChalcedony Park, Arizona.
Chalcedony is a translucent substance of rather waxy lustre, presenting great variety of colours, though usually white, grey, yellow or brown.
Certain pseudomorphs of chalcedony after datolite, from Haytor in Devonshire, have received the name of "haytorite.
The blade is of a semi-translucent chalcedony found in the volcanic regions of Mexico.
Defn: A variety of onyx consisting of sard and white chalcedony in alternate layers.
All the birds in the world were singing all together and also all the streams, and Inzana sat and listened and thought of no golden ball, nor ever of chalcedony and onyx, nor of all her fathers the gods, but only of all the birds.
And Slid stood up, swarthy, and clad in seaweed, and mightily dived from the last chalcedony step out of Pegana's threshold straight into ocean.
Now here is a pebble, part of chalcedony, part of baser flint; the chalcedony tinted red and orange.
Notice that half of the stone is coarse muddy flint, but the other half is chalcedony of a red-purple tint.
NOTE 1] There are rivers in this country, in which quantities of Jasper and Chalcedony are found.
A variety of quartz or chalcedony exhibiting opalescent reflections from within, like the eye of a cat.
A variety of onyx consisting of sard and white chalcedony in alternate layers.
Sometimes this black flint passes into chert and chalcedony of blue and purple tints.
This being nicely arranged, I hung her chalcedonycharm from her neck, and fastened it to her waist-band.
He wants to show you how nicely he made the Chalcedony Spalla that used to be round my neck.
Some of the finer grades, as chalcedony and quartz, that have received the highest finish, appear to have had all the work done by grinding or rubbing, as even those only slightly worked bear no signs of hammering or pecking.
The inside of the buildings in this lower court stood upon great pillars of chalcedony stone and porphyry marble made archways after a goodly antique fashion.
Fragments of jasper and chalcedony occur in the beds of the streams that here drain the precipitous sides of the range.
In these cases where the imbedded corals were already much decayed, it is probable that the empty cavities thus produced were filled with silica, and that in this manner the nodules ofchalcedony were produced.
They are sometimes compact and sometimes amygdaloidal, the amygdules being formed of chalcedony and other minerals, whilst the glass of the groundmass is often altered.
A greenish altered foraminiferous tuff showing fine cracks filled with chalcedony composes a spur in this locality.
The supply is obtained almost wholly from India, especially from the Kathiawar Peninsula west of Cambay, whence agate, carnelian and chalcedony are also obtained.
These chalcedony veins ramify in all directions and often extend for many rods without interruption.
At Tampa Bay, Florida, the waters containing chalcedony have penetrated corals and preserved them, often giving forms showing the shape of the coral outside and a cavity within.
Common chalcedonyhas a waxy luster and is usually translucent rather than transparent.
Some class agate, onyx, sardonyx, plasma and carnelian together as varieties of chalcedony, while others consider chalcedony a simple variety.
This chalcedony is mentioned as one of the foundation stones of the Holy City in the Book of Revelations.
Common chalcedony has little color, shades of gray and blue being the most common, although other tints occur.
A white variety of chalcedony containing minute blood red spots is known as St. Stephen's stone.
Throughout the "Bad Lands" of the West, clefts in the hills are often filled with sheets of chalcedony varying in thickness from that of thin paper to nearly an inch.
The name chalcedonyis from Chalcedon, a city in Asia Minor, where the original chalcedony was found.
Some authorities, however, call the green chalcedony plasma and restrict the term chrysoprase to the green compact quartz.
Chalcedony was formerly used much more and more highly prized than at the present time.
When the chalcedony is penetrated by branching forms of manganese or iron oxide the forms known as "mocha stones" and "moss agates" are produced.
Chrysoprase and Prase are terms applied to an apple green to bright green chalcedony or compact, jasper-like form of quartz.
We observed, on these mountains, large masses of green-stone, and beautiful pebbles of chalcedony and fine agate; the summits of the highest are covered with snow.
The soil here is of a deep reddish or ferruginous hue, intermixed with green sand; and on the heights, pebbles of chalcedony and agate are abundant.
Much commercial chrysoprase is chalcedony artificially stained by impregnation with a green salt of nickel.
A large arrow-head of chalcedony has been bound with cords of cotton flatwise along one side of the body.
A small pink chalcedony arrow-point is attached to the back between the wings by means of a single sinew band passed around the tips of the latter and the tail and under the wings over the shoulders.
The many semi-precious stones which have a quartz basis (such as the varieties of waxy or cryptocrystalline chalcedony which is largely quartz in a very minutely crystalline condition) are often even tougher than the clear crystallized quartz.
An opalescent form of chalcedony is frequently gathered on California beaches and polished for tourists under the name of "California Moonstone.
Bloodstone" is a greenish chalcedony with spots of red jasper.
For example, large quantities of somewhat porous chalcedony from Brazil are stained and sold in imitation of natural agate or sard or other stones.
Small fragments of the jasper, examined under the microscope, seem to resemble the chalcedony with its colouring matter not separated into layers, but mingled in the siliceous paste, together with some impurities.
We picked up fragments of chalcedony and small blocks of volcanic rock, or basalt.
Passing along the street one day, he saw a boy wearing round his neck a chalcedonywith a figure engraved, which the learned man thought he recognised as a work of Polycletes.
Niccoli, who was not rich, accepted, and the chalcedony passed into the hands of Scarampi, then to Paul II.
At 103 feet, at the bottom of the yellow clay and on top of the gravel, was a chalcedony pebble about 2½ inches in diameter.
There was nothing in the trench, at any depth, after the chalcedony pebble, that could possibly be due to human intervention, except these small patches of ashes, if ashes they are.
Rarely, quartz or chalcedony is found; it resembles the deposit around hot springs or in fissures, and, like the obsidian, is in fragments too small to be utilized except as a grinding or polishing material for smoothing wrought objects.
Here we at once found, and found in situ for the first time, the chalcedony which strews the seaboard-flat.
The small specimens of chalcedony in my private collection were examined at Trieste, and one of them contained dendritic gold, visible to the naked eye.
Free gold in paillettes was noticed by the Expedition in the micaceous schists veining the quartz, and in the chalcedony which parts the granite from the gneiss.
There were large spherical bowls, and oval vases, of chalcedony and agate, and reliefs cut in cornelians, nephrit, and other coloured stones.
Like sumptuous cold chalcedony Our weary breasts and hands must be To carry spices to the gods.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "chalcedony" in a variety of sentences. We hope that you will now be able to make sentences using this word.
