Error message

  • Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
  • Deprecated function: TYPO3\PharStreamWrapper\Manager::initialize(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
  • Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $resolver as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
  • Deprecated function: TYPO3\PharStreamWrapper\Manager::__construct(): Implicitly marking parameter $collection as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 19 of includes/file.phar.inc).
  • Deprecated function: session_set_save_handler(): Providing individual callbacks instead of an object implementing SessionHandlerInterface is deprecated in drupal_session_initialize() (line 245 of includes/session.inc).
  • Deprecated function: SelectQueryInterface::getArguments(): Implicitly marking parameter $queryPlaceholder as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: SelectQueryInterface::preExecute(): Implicitly marking parameter $query as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: SelectQueryExtender::getArguments(): Implicitly marking parameter $queryPlaceholder as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: SelectQueryExtender::preExecute(): Implicitly marking parameter $query as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: SelectQuery::getArguments(): Implicitly marking parameter $queryPlaceholder as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: SelectQuery::preExecute(): Implicitly marking parameter $query as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: DrupalEntityControllerInterface::resetCache(): Implicitly marking parameter $ids as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: DrupalDefaultEntityController::resetCache(): Implicitly marking parameter $ids as nullable is deprecated, the explicit nullable type must be used instead in include_once() (line 3575 of includes/bootstrap.inc).
  • Deprecated function: stripos(): Passing null to parameter #1 ($haystack) of type string is deprecated in _ajax_register_ajax_links() (line 397 of sites/all/modules/ajax_register/ajax_register.module).

Natural Coloration

Juglet
4th century A.D.
Ht., 12.3 cm

Glass is not naturally colorless. Beach sand invariably contains black particles of iron oxides scattered through it. When fired in a usual, oxygen-rich environment (i.e., with the furnace in an oxidizing state), these impurities give the glass a natural aquablue to light green tinge. The typical amount of iron in beach sand is 0.3%: the intensity of the color increases as the amount of iron increases.

Ingredients
Glassmaking References