Obsidian and rock crystal were also used for knife making.
Large areas are overlain with trachyte, basalt, obsidian, tuff and pumice.
Breakfast was on the magic obsidian tray next to the bed.
Distraught, she rolled over to find the first surprise of the day on the block of stone that acted as a nightstand: an obsidian tray of fruit and fresh pastries.
The most characteristic weapon of the Mexicans was the maquahuitl or " handwood," a club set with two rows of large sharp obsidian flakes, a well-directed blow with which would cut down man or horse.
OBSIDIAN, a glassy volcanic rock of acid composition.
Few obsidians are entirely vitreous; usually they have small crystals of felspar, quartz, biotite or iron oxides, and when these are numerous the rock is called a porphyritic obsidian (or hyalo-liparite).
The only place where obsidian is known to be found in Sardinia in a natural state is the Punta Trebina, a mountain south-east of Oristano.
The archers shot well and with strong bows, though their arrows were generally tipped only with stone or bone; their shields or targets, mostly round, were of ordinary barbaric forms; the spears or javelins had heads of obsidian or bronze, and were sometimes hurled with a spear-thrower or atlatl, of which pictures and specimens still exist, showing it to be similar in principle to those used by the Australians and Eskimo.
They perform complicated surgical operations with an obsidian knife or a shark's tooth.
Artificers' implements of many kinds were in use, bronze succeeding obsidian and other hard stones as the material.
to Melos in the earlier Second City Period of Phylakope) and to Cyprus, receiving in return such commodities as Melian obsidian knives.
Celts, of the usual late neolithic type, were generally of green jasper; hoe-blades (looking almost exactly like palaeolithic haches a main) of chert or coarse limestone; hammers of granite; mace-heads, of identical type with the early Egyptian, of diorite and limestone; nails of obsidian or smoky quartz, often beautifully made.
On the paved platform were three-storey tower temples in whose ground-floor stood the stone images and altars, and before that of the war-god the green stone of sacrifice, humped so as to bend upward the body of the victim that the priest might more easily slash open the breast with his obsidian knife, tear out the heart and hold it up before the god, while the captor and his friends were waiting below for the carcase to be tumbled down the steps for them to carry home to be cooked for the feast of victory.
The volcanic series include the rhyolite of Nell Island, some obsidian, and the sheets of basalts which form the Cloudy Mountains, Mount Dayman and Mount Trafalgar (an active volcano), and also cover wide areas to the south and west of the Owen Stanley Range.
Another type of incipient crystallization which is excessively common in obsidian is spherulites, or small rounded bodies which have a radiating fibrous structure.
The substance known as moldavite, often regarded as an obsidian, and the so-called obsidian bombs, or obsidianites, are described under MOLDAVITE.
Iron was not known, but copper and tin ores were mined, and the metals combined into bronze of much the same alloy as in the Old World, of which hatchet blades and other instruments were made, though their use had not superseded that of obsidian and other sharp stone flakes for cutting, shaving, &c. Metals had passed into a currency for trading purposes, especially quills of gold-dust and T-shaped pieces of copper, while coco-beans furnished small change.
It is probable that the acropolis of Carales was occupied even in prehistoric times; but more abundant traces of prehistoric settlements (pottery and fragments of obsidian, also kitchen middens, containing bones of animals and shells of molluscs used for human food) have been found on the Capo S.
It was sensual, dark and cool: black walls and obsidian wood flooring covered by jewel-toned rugs, mahogany California King bed with the finest maroon silk sheets and a dark gray comforter so soft, it was like sleeping in a cloud.
Numerous fragments of obsidian arrow-heads and chips are also found in and near them all over the island.
Like the rest of the cluster, the island is of volcanic origin, with tuff, trachyte and obsidian among its ordinary rocks.
The position of Melos, between Greece and Crete, and its possession of obsidian, made it an important centre of early Aegean civilization.
(4) Commerce was practised to some extent in very early times, as is proved by the distribution of Melian obsidian over all the Aegean area and by the Nilotic influence on early Minoan art.
The chemical composition of typical obsidians is shown by the following analyses Obsidian, when broken, shows a conchoidal fracture, like that of glass, and yields sharp-edged fragments, which have been used in many localities as arrow-points, spear-heads, knives and razors.
By the ancient Greeks and Romans obsidian was worked as a gem-stone; and in consequence of its having been often imitated in glass there arose among collectors of gems in the 18th century the practice of calling all antique pastes "obsidians."
At the present time obsidian is sometimes cut and polished as an ornamental stone, but its softness (H = 5 to 5.5) detracts from its value.
The polished battle-axe was more used in Grand Canary, while stone and obsidian, roughly cut, were commoner in Teneriffe.
south-east of the harbour, a neolithic village was situated, with a rampart of small blocks of obsidian, about 25 ft.
wide at the base, and 16 at the top, upon the undefended eastern side: within it remains of huts were found, with pottery, tools of obsidian, &c. The objects discovered are in the museum at Syracuse.
The Nahuatl lapidaries had at hand many varieties of workable and beautiful stone - onyx, marble, limestone, quartz and quartz crystal, granite, syenite, basalt, trachyte, rhyolite, diorite and obsidian, the best of material prepared for them by nature; while the Mayas had only limestone, and hard, tenacious rock with which to work it, and timber for burning lime.
The bulk of the mountain consists of andesite, but porphyry, obsidian, trachyte, basalt, and.
Rhyolitic lavas frequently are more or less vitreous, and when the glassy matter greatly predominates and the; crystals are few and inconspicuous the rock becomes an obsidian; the chemical composition is essentially the same as that of granite; the difference in the physical condition of the two rocks is due to the fact that one consolidated at the surface, rapidly and under low pressures, while the other cooled slowly at great depths and under such pressures that the escape of the steam and other gases it contained was greatly impeded.
Much pottery was found, including examples of a peculiar style, with decorative designs, mostly floral, and also considerable deposits of obsidian.
They have long been known to geologists and are found at Okhotsk, Siberia, in association with a large mass of perlitic obsidian.
Both Great and Little Ararat consist entirely of volcanic rocks, chiefly andesites and pyroxene andesites, with some obsidian.
Qat produced dawn, for the first time, by cutting the darkness with a knife of red obsidian.
This burial was accompanied by five leaf shaped obsidian arrowheads, a bronze dagger and arrowhead and also a horse burial.
The Ancient Egyptians used obsidian in talismans, which had to be imported from Ethiopia.
Beyond the fence could be glimpsed a squat building of glassy, black obsidian.
I spent ages staring out of my window at the glassy, obsidian, black example I borrowed last week.
Human settlements as old as 9000 years have contained mirrors of polished obsidian; self-reflection has been with us since the dawn of consciousness.
obsidian knife blades.
obsidian hydration dating.
obsidian arrowheads, a bronze dagger and arrowhead and also a horse burial.
obsidian dagger lay beside the base of the altar stone.
The obsidian zone located in the southern part contains primarily Upper Acheulean obsidian zone located in the southern part contains primarily Upper Acheulean obsidian artifacts.
snowflake obsidian is known as " the stone of purity " helping to balance and purify the mind and body.
Natural glass, like obsidian, is a dense volcanic glass, and has been used by man for millennia.
obsidian, chert, chalcedony, agate and quartzite, but to prehistoric man (see FLINT IMPLEMENTS below) flint must have been of great value and served many of the uses to which steel is put at the present day.
After having fully described the obsidian, I shall return to the subject of the lamination of rocks of the trachytic series.
The RFH process may also form the flow banding that is nearly ubiquitous in obsidian.
For more affordable gems, imitations are available, and alternative rocks such as obsidian and black pearls can make a similarly dramatic piece of jewelry for far less expense.
In fact, it is quite well known that people born under this sign can discern evil plans and interpersonal problems of others by reflecting them in a mirror of obsidian glass.
The boot uppers are leather and sheepskin, and come in black or obsidian.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.